Cell and Tissue Biology

Objects

All labeled objects are listed alphabetically. Click the appropriate letter below and then on an object name...

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Object names starting with "S":

Object Name # of Images Description
Sarcomere 2 Fundamental functional unit of muscle. Extends from one Z-line to the next.
Satellite (Schwann) cells 1 Form myelin in the peripheral nervous system. They are the equivalent of glia in the CNS. Originate from the neural crest.
Scala media (with endolymph) 1 The middle of the three scalae in the cochlea. Houses the organ of Corti.
Scala tympani 1 Perilymph-containing space in the inner ear opening into the round window.
Scala vestibuli 1 Perilymph-containing space in the inner ear opening into the oval window.
Schmidt-Lantermann incisure 1 A remnant of Schwann cell cytoplasm in the myelin sheath.
Schmidt-Lantermann incisures 1 Remnants of Schwann cell cytoplasm in the myelin sheath.
Schwann cell nuclei 1 Prominent membrane-bounded organelles in eukaryotic cells containing DNA. Sites of synthesis of various RNA's.
Schwann cell nuclei 2 Prominent membrane-bounded organelles in eukaryotic cells containing DNA. Sites of synthesis of various RNA's.
Schwann cell nucleus 1 Prominent membrane-bounded organelle in a eukaryotic cell containing DNA. Site of synthesis of various RNA's.
Sclera 1 The outermost tough layer covering the eye. It is continuous with the cornea. Composed of collagen fibers and fibroblasts. Extraocular muscles are attached to the sclera.
Sclera 1 The outermost tough layer covering the eye. It is continuous with the cornea. Composed of collagen fibers and fibroblasts. Extraocular muscles are attached to the sclera.
Sclera 1 The outermost tough layer covering the eye. It is continuous with the cornea. Composed of collagen fibers and fibroblasts. Extraocular muscles are attached to the sclera.
Sclera 1 The outermost tough layer covering the eye. It is continuous with the cornea. Composed of collagen fibers and fibroblasts. Extraocular muscles are attached to the sclera.
Sebaceous gland 2 Pluristratified alveolar glands with holocrine secretion. Scattered in dermis except in palms and soles.
Sebaceous gland 2 Pluristratified alveolar glands with holocrine secretion. Scattered in dermis except in palms and soles.
Sebaceous glands 1 Pluristratified alveolar glands with holocrine secretion. Scattered in dermis except in palms and soles.
Sebaceous glands 1 Pluristratified alveolar glands with holocrine secretion. Scattered in dermis except in palms and soles.
Sebaceous glands 1 Pluristratified alveolar glands with holocrine secretion. Scattered in dermis except in palms and soles.
Sebaceous glands 1 Pluristratified alveolar glands with holocrine secretion. Scattered in dermis except in palms and soles.
Secretory cell (peg cell) 1 Found in the epithelium of the oviduct. Squeezed by the neighboring ciliated cells.
Secretory cells 1 All cells specializing in exocrine (or endocrine) secretion.
Secretory cells 1 All cells specializing in exocrine (or endocrine) secretion.
Secretory granule membrane 1 Membrane of a storage vesicle containing zymogens and other substances.
Secretory granules 2 Storage vesicles containing zymogens and other substances. Appear as granules in LM.
Secretory granules 1 Storage vesicles containing zymogens and other substances. Appear as granules in LM.
Secretory granules 1 Storage vesicles containing zymogens and other substances. Appear as granules in LM.
Secretory granules 2 Storage vesicles containing zymogens and other substances. Appear as granules in LM.
Secretory granules w/ membrane 1 Storage vesicles containing zymogens and other substances. Appear as granules in LM.
Secretory vesicles 1 Storage vesicles containing zymogens and other substances. Appear as granules in LM.
Secretory vesicles 1 Storage vesicles containing zymogens and other substances. Appear as granules in LM.
Secretory vesicles 2 Storage vesicles containing zymogens and other substances. Appear as granules in LM.
Secretory vesicles - endocrine 1 Storage vesicles containing protein prohormones and other substances. Appear as granules in LM.
Secretory vesicles - exocrine 1 Storage vesicle containing zymogens and other substances. Appear as granules in LM.
Secretory vesicles w/ membrane 1 Storage vesicle containing zymogens and other substances. Appear as granules in LM.
Secretory vesicles with pepsino 1 (Self-explanatory)
Semicircular canal - portion of 1 Part of the vestibular apparatus of the inner ear.
Semilunar valve 1 Three pocketlike endothelium-lined sheets of connective tissue arranged around the root of the aorta and at the beginning of the pulmonary vein. The valves are anchored in the cardiac skeleton. Prevent backflow of blood during diastole.
Semilunar valve 2 Three pocketlike endothelium-lined sheets of connective tissue arranged around the root of the aorta and at the beginning of the pulmonary vein. The valves are anchored in the cardiac skeleton. Prevent backflow of blood during diastole.
Semilunar valve cusp 1 A pocketlike endothelium-lined sheet of connective tissue arranged around the root of the aorta and at the beginning of the pulmonary vein. The valves are anchored in the cardiac skeleton. Prevent backflow of blood during diastole.
Seminal vesicle (c.s.) 1 An irregularly-shaped, paired, accessory male sexual organ located behind the prostate. Produces fructose necessary for spermatozoan nutrition.
Seminiferous tubules 2 Highly convoluted channels forming the excretory parenchyma of testes. Total length is around 250 m in one testis.
Seminiferous tubules 2 Highly convoluted channels forming the excretory parenchyma of testes. Total length is around 250 m in one testis.
Sensory cortex 1 Primarily involved in somatic sensory perception.
Sensory neurons 1 Neurons conducting impulses from the periphery of the body to the central nervous system.
Serosa 1 In the intestine, the serosa is composed of the peritoneal lining.
Serous acini 1 Cuboidal cells forming acini. Usually secrete a protein-rich liquid.
Serous acini 1 Cuboidal cells forming acini. Usually secrete a protein-rich liquid.
Serous acinus 1 Cuboidal cells forming acini. Usually secrete a protein-rich liquid.
Serous glands of von Ebner 1 The tongue contains both serous and mucous glands.
Serous lingual glands 1 The tongue contains both serous and mucous glands.
Sertoli cell 1 Highly irregularly-shaped, nondividing, tall cell extending from the basal lamina to the lumen of seminiferous tubules. It has several functions, e.g., producing androgen-binding protein to concentrate testosterone. Provides the blood-testis barrier.
Sertoli cell nuclei 1 Prominent membrane-bounded organelles in eukaryotic cells containing DNA. Sites of synthesis of various RNA's. Sertoli cells have prominent nuclei. Their cytoplasm is often difficult to identify.
Sertoli cell nuclei 2 Prominent membrane-bounded organelles in eukaryotic cells containing DNA. Sites of synthesis of various RNA's. Sertoli cells have prominent nuclei. Their cytoplasm is often difficult to identify.
Sertoli cell nucleus 1 Prominent membrane-bounded organelle in a eukaryotic cell containing DNA. Site of synthesis of various RNA's. Sertoli cells have a prominent nucleus. The cytoplasm is often difficult to identify.
Sertoli cell nucleus 1 Prominent membrane-bounded organelle in a eukaryotic cell containing DNA. Site of synthesis of various RNA's. Sertoli cells have a prominent nucleus. The cytoplasm is often difficult to identify.
Sertoli cells 1 Highly irregularly-shaped, nondividing, tall cells extending from the basal lamina to the lumen of seminiferous tubules. They have several functions, e.g., producing androgen-binding protein to concentrate testosterone. Provide the blood-testis barrier.
Sertoli cells 2 Highly irregularly-shaped, nondividing, tall cells extending from the basal lamina to the lumen of seminiferous tubules. They have several functions, e.g., producing androgen-binding protein to concentrate testosterone. Provide the blood-testis barrier.
Shrunken nucleus 1 A nucleus decreased in size, as would happen when it is being lost from a precursor cell, or a dying cell. RBC precursors have shrunken nuclei.
Simple columnar cell 1 A columnar cell is taller than wide.
Simple columnar epithelium 3 Composed of columnar cells, i.e., those taller than wide.
Simple columnar epithelium 2 Composed of columnar cells, i.e., those taller than wide.
Simple columnar epithelium 1 Composed of columnar cells, i.e., those taller than wide.
Simple cuboidal epithelium 1 Composed of cells resembling a cube in shape.
Simple squamous epithelium 1 Composed of simple squamous cells. The cells look like scales, hence the name.
Simple squamous epithelium 5 Composed of simple squamous cells. The cells look like scales, hence the name.
Simple squamous epithelium 1 Composed of simple squamous cells. The cells look like scales, hence the name.
Sinusoid lumen 1 (Self-explanatory)
Sinusoid lumina 1 (Self-explanatory)
Sinusoidal capillaries 1 Sinusoidal capillaries are wider than ordinary capillaries. Their endothelial cells have a discontinuous basal lamina. Found in liver and endocrine glands.
Sinusoidal capillaries 1 Sinusoidal capillaries are wider than ordinary capillaries. Their endothelial cells have a discontinuous basal lamina. Found in liver and endocrine glands.
Sinusoidal lumen 1 (Self-explanatory)
Sinusoidal lumina 1 (Self-explanatory)
Sinusoids 2 Specialized capillaries in the liver. The endothelium is fenestrated and discontinuous. They lack a basal lamina to facilitate exchange of materials.
Sinusoids 1 Specialized capillaries in the liver. The endothelium is fenestrated and discontinuous. They lack a basal lamina to facilitate exchange of materials.
Sinusoids 2 Specialized capillaries in the liver. The endothelium is fenestrated and discontinuous. They lack a basal lamina to facilitate exchange of materials.
Sinusoids 3 Specialized capillaries in the liver. The endothelium is fenestrated and discontinuous. They lack a basal lamina to facilitate exchange of materials.
Sinusoids, hepatic 1 Specialized capillaries in the liver. The endothelium is fenestrated and discontinuous. They lack a basal lamina to facilitate exchange of materials.
Skeletal muscle 1 Functional unit composed of large number of skeletal muscle fibers grouped in muscle fascicles and enveloped in successive connective tissue sheaths. Usually under voluntary control.
Skeletal muscle 1 Functional unit composed of large number of skeletal muscle fibers grouped in muscle fascicles and enveloped in successive connective tissue sheaths. Usually under voluntary control.
Skeletal muscle 1 Functional unit composed of large number of skeletal muscle fibers grouped in muscle fascicles and enveloped in successive connective tissue sheaths. Usually under voluntary control.
Skeletal muscle 4 Functional unit composed of large number of skeletal muscle fibers grouped in muscle fascicles and enveloped in successive connective tissue sheaths. Usually under voluntary control.
Skeletal muscle 6 Functional unit composed of large number of skeletal muscle fibers grouped in muscle fascicles and enveloped in successive connective tissue sheaths. Usually under voluntary control.
Skeletal muscle 8 Functional unit composed of large number of skeletal muscle fibers grouped in muscle fascicles and enveloped in successive connective tissue sheaths. Usually under voluntary control.
Skeletal muscle c.s. 1 Functional unit composed of large number of skeletal muscle fibers grouped in muscle fascicles and enveloped in successive connective tissue sheaths. Usually under voluntary control.
Skeletal muscle c.s. 1 Functional unit composed of large number of skeletal muscle fibers grouped in muscle fascicles and enveloped in successive connective tissue sheaths. Usually under voluntary control.
Skeletal muscle cell nucleus 1 In skeletal muscle the nuclei are located peripherally, close to the cell membrane.
Skeletal muscle l.s. 1 Functional unit composed of large number of skeletal muscle fibers grouped in muscle fascicles and enveloped in successive connective tissue sheaths. Usually under voluntary control.
Skeletal muscle l.s. 2 Functional unit composed of large number of skeletal muscle fibers grouped in muscle fascicles and enveloped in successive connective tissue sheaths. Usually under voluntary control.
Skin 1 Organ forming the external surface of the body. Part of the defense mechanism of the body.
Skin 1 Organ forming the external surface of the body. Part of the defense mechanism of the body.
Sloughing cells 1 Cells detaching from the surface in a normal process.
Sloughing surface cells 1 Cells detaching from the surface in a normal process.
Small arteries 1 Carry (usually oxygenated) blood from the heart.
Small arteries 1 Carry (usually oxygenated) blood from the heart.
Small artery 1 Carries (usually oxygenated) blood from the heart.
Small artery 1 Carries (usually oxygenated) blood from the heart.
Small artery 1 Carries (usually oxygenated) blood from the heart.
Small artery (lumen) 1 (Self-explanatory)
Smaller neurons 1 (Self-explanatory)
Smooth endoplasmic reticulum 1 Endoplasmic reticulum lacking polyribosomes. Cisternae are often tubular and branching. Contains some enzymes required for steroid synthesis. Also serves as a site for oxidation and detoxification reactions, perticularly in hepatocytes.
Smooth endoplasmic reticulum 2 Endoplasmic reticulum lacking polyribosomes. Cisternae are often tubular and branching. Contains some enzymes required for steroid synthesis. Also serves as a site for oxidation and detoxification reactions, perticularly in hepatocytes.
Smooth endoplasmic retimulum 1 Endoplasmic reticulum lacking polyribosomes. Cisternae are often tubular and branching. Contains some enzymes required for steroid synthesis. Also serves as a site for oxidation and detoxification reactions, perticularly in hepatocytes
Smooth muscle 1 Long spindle-shaped cells arranged so that the thin end of one cell is adjacent to the thickest portion of another cell. Usually involuntary. An aggregation of many smooth muscle cells forms the contractile portions of various organs.
Smooth muscle 3 Long spindle-shaped cells arranged so that the thin end of one cell is adjacent to the thickest portion of another cell. Usually involuntary. An aggregation of many smooth muscle cells forms the contractile portions of various organs.
Smooth muscle 1 Long spindle-shaped cells arranged so that the thin end of one cell is adjacent to the thickest portion of another cell. Usually involuntary. An aggregation of many smooth muscle cells forms the contractile portions of various organs.
Smooth muscle 10 Long spindle-shaped cells arranged so that the thin end of one cell is adjacent to the thickest portion of another cell. Usually involuntary. An aggregation of many smooth muscle cells forms the contractile portions of various organs.
Smooth muscle 12 Long spindle-shaped cells arranged so that the thin end of one cell is adjacent to the thickest portion of another cell. Usually involuntary. An aggregation of many smooth muscle cells forms the contractile portions of various organs.
Smooth muscle 7 Long spindle-shaped cells arranged so that the thin end of one cell is adjacent to the thickest portion of another cell. Usually involuntary. An aggregation of many smooth muscle cells forms the contractile portions of various organs.
Smooth muscle 1 Long spindle-shaped cells arranged so that the thin end of one cell is adjacent to the thickest portion of another cell. Usually involuntary. An aggregation of many smooth muscle cells forms the contractile portions of various organs.
Smooth muscle (tunica media) 1 Long spindle-shaped cells arranged so that the thin end of one cell is adjacent to the thickest portion of another cell. Usually involuntary. An aggregation of many smooth muscle cells forms the contractile portions of various organs.
Smooth muscle bundles 1 Long spindle-shaped cells arranged so that the thin end of one cell is adjacent to the thickest portion of another cell. Usually involuntary. An aggregation of many smooth muscle cells forms the contractile portions of various organs.
Smooth muscle bundles 1 Long spindle-shaped cells arranged so that the thin end of one cell is adjacent to the thickest portion of another cell. Usually involuntary. An aggregation of many smooth muscle cells forms the contractile portions of various organs.
Smooth muscle c.s. 1 Long spindle-shaped cells arranged so that the thin end of one cell is adjacent to the thickest portion of another cell. Thus in c.s. not all muscle fibers show nuclei at the same level. Usually involuntary.
Smooth muscle c.s. 1 Long spindle-shaped cells arranged so that the thin end of one cell is adjacent to the thickest portion of another cell. Thus in c.s. not all muscle fibers show nuclei at the same level. Usually involuntary.
Smooth muscle c.s. 2 Long spindle-shaped cells arranged so that the thin end of one cell is adjacent to the thickest portion of another cell. Thus in c.s. not all muscle fibers show nuclei at the same level. Usually involuntary.
Smooth muscle cell nuclei 1 Usually one nucleus per cell located centrally. Nuclear shape resembles the shape of the cell. When the muscle contracts the nucleus assumes a corkscrew-like shape.
Smooth muscle cells 1 Long spindle-shaped cells arranged so that the thin end of one cell is adjacent to the thickest portion of another cell. Usually involuntary. An aggregation of many smooth muscle cells forms the contractile portions of various organs.
Smooth muscle fibers c.s. 1 Long spindle-shaped cells arranged so that the thin end of one cell is adjacent to the thickest portion of another cell. Thus in c.s. not all muscle fibers show nuclei at the same level. Usually involuntary.
Smooth muscle fibers, arteriole 1 Smooth muscle fibers surround the lumen of the arteriole, aiding in contraction.
Smooth muscle in duct wall 1 Wall of the respiratory duct contains smooth muscle. An aggregation of many smooth muscle cells forms the contractile portions of various organs.
Smooth muscle l.s. 1 Long spindle-shaped cells arranged so that the thin end of one cell is adjacent to the thickest portion of another cell. Usually involuntary. An aggregation of many smooth muscle cells forms the contractile portions of various organs.
Smooth muscle l.s. 1 Long spindle-shaped cells arranged so that the thin end of one cell is adjacent to the thickest portion of another cell. Usually involuntary. An aggregation of many smooth muscle cells forms the contractile portions of various organs.
Smooth muscle layer 1 Long spindle-shaped cells arranged so that the thin end of one cell is adjacent to the thickest portion of another cell. Usually involuntary. An aggregation of many smooth muscle cells forms the contractile portions of various organs.
Smooth muscle layer 1 Long spindle-shaped cells arranged so that the thin end of one cell is adjacent to the thickest portion of another cell. Usually involuntary. An aggregation of many smooth muscle cells forms the contractile portions of various organs.
Smooth muscle layers 1 Long spindle-shaped cells arranged so that the thin end of one cell is adjacent to the thickest portion of another cell. Usually involuntary. An aggregation of many smooth muscle cells forms the contractile portions of various organs.
Smooth muscle nuclei 1 Usually one nucleus per cell located centrally. Nuclear shape resembles the shape of the cell. When the muscle contracts the nucleus assumes a corkscrew-like shape.
Smooth muscle nuclei 1 Usually one nucleus per cell located centrally. Nuclear shape resembles the shape of the cell. When the muscle contracts the nucleus assumes a corkscrew-like shape.
Smooth muscle nucleus 2 Usually one nucleus per cell located centrally. Nuclear shape resembles the shape of the cell. When the muscle contracts the nucleus assumes a corkscrew-like shape.
Somatostatin cell (?) 1 A kind of enteroendocrine cell. The reason it is labeled as a somatostatin cell is that it seems to have cell processes in close association to the other cells suggesting a paracrine mode of secretion. Somatostatin in known to inhibit HCl secretion.
Space of Disse 1 The space between an endothelial cell and a hepatocyte in the liver. Enables intercellular exchange of metabolites.
Space of Disse 1 The space between an endothelial cell and a hepatocyte in the liver. Enables intercellular exchange of metabolites.
Spermatid 1 Medium-sized, round daughter cell of the secondary spermatocyte. Spermatids do not divide, but undergo drastic morphological changes during spermiogenesis.
Spermatid nucleus 1 (Self-explanatory)
Spermatid with developing tail 1 Medium-sized, round daughter cell of the secondary spermatocyte. Spermatids do not divide, but undergo drastic morphological changes during spermiogenesis.
Spermatids 2 Medium-sized, round daughter cells of the secondary spermatocyte. Spermatids do not divide, but undergo drastic morphological changes during spermiogenesis.
Spermatids 1 Medium-sized, round daughter cells of the secondary spermatocyte. Spermatids do not divide, but undergo drastic morphological changes during spermiogenesis.
Spermatogonia 1 Stem cells for spermatogenesis. Divide mitotically to maintain the stem cell population. A special type, B1, will become the primary spermatocyte.
Spermatogonia 1 Stem cells for spermatogenesis. Divide mitotically to maintain the stem cell population. A special type, B1, will become the primary spermatocyte.
Spermatogonia 1 Stem cells for spermatogenesis. Divide mitotically to maintain the stem cell population. A special type, B1, will become the primary spermatocyte.
Spermatogonia 1 Stem cells for spermatogenesis. Divide mitotically to maintain the stem cell population. A special type, B1, will become the primary spermatocyte.
Spermatogonia 1 Stem cells for spermatogenesis. Divide mitotically to maintain the stem cell population. A special type, B1, will become the primary spermatocyte.
Spermatogonium 1 Stem cell for spermatogenesis. Divides mitotically to maintain the stem cell population. A special type, B1, will become the primary spermatocyte.
Spermatozoa 1 The end product of spermatogenesis. Represents clever packaging of genetic material.
Spermatozoa tails 1 The lumen of the epididymis may be packed full of spermatozoa as in this picture.
Spermatozoa tails, c.s. 1 In a mature spermatozoan the tail is a flagellum. In the LM the ultrastructure cannot be seen.
Spermatozoan head 1 The head of the mature spermatozoan is composed of a totally heterochromatic nucleus covered by the acrosome and cell membrane.
Spermatozoan head 1 The head of the mature spermatozoan is composed of a totally heterochromatic nucleus covered by the acrosome and cell membrane.
Spermatozoan head 1 The head of the mature spermatozoan is composed of a totally heterochromatic nucleus covered by the acrosome and cell membrane.
Spermatozoan nucleus 1 (Self-explanatory)
Spermatozoan tail 1 In a mature spermatozoan the tail is a flagellum. In the LM the ultrastructure cannot be seen.
Sphincter pupillae 1 Constricts the pupil. Of neuroectodermal origin.
Sphincter pupillae 3 Constricts the pupil. Of neuroectodermal origin.
Sphincter pupillae of iris 1 Constricts the pupil. Of neuroectodermal origin.
Spiral ligament 1 The attachment of the basilar membrane to the outer bony wall in the cochlea.
Spiral ligament 2 The attachment of the basilar membrane to the outer bony wall in the cochlea.
Splenic capsule 1 Connective tissue capsule covering the spleen.
Splenic trabecula 1 Blood filter. In the red pulp of the spleen the trabecula are composed of numerous cells, including macrophages, dendritic cells, fibroblasts, (and all cells of the blood travelling through).
Spongy (trabecular) bone 1 Usually fills the central portion of bone. More metabolically active than compact bone.
Spot desmosome 2 Disk-like intercellular attachment between neighboring cells. Abundant in epidermis.
Spot desmosome 1 Disk-like intercellular attachment between neighboring cells. Abundant in epidermis.
Spot desmosome 2 Disk-like intercellular attachment between neighboring cells. Abundant in epidermis.
Spot desmosomes 2 Disk-like intercellular attachments between neighboring cells. Abundant in epidermis.
Spot desmosomes 2 Disk-like intercellular attachments between neighboring cells. Abundant in epidermis.
Spot desmosomes 2 Disk-like intercellular attachments between neighboring cells. Abundant in epidermis.
Stapedius muscle 1 Contraction of this muscle attenuates the sound of our own voice and those of mastication. This is the smallest skeletal muscle in the human body.
Stapes 1 The bone of the middle ear impinging on the oval window.
Stellate cells 1 A kind of a neuron. Note the dendrites extending in all directions.
Stomach pits 1 The epithelium of the stormach indents to form
Strata basale and spinosum 2 The two lowest layers of epidermis.
Stratified epithelium 1 Multi-layered epithelium.
Stratified squamous epithelium 1 Multi-layered epithelium. Nomenclature refers to the shape of the surface cells only.
Stratified squamous epithelium 1 Multi-layered epithelium. Nomenclature refers to the shape of the surface cells only.
Stratified squamous epithelium 3 Multi-layered epithelium. Nomenclature refers to the shape of the surface cells only.
Stratified squamous epithelium 4 Multi-layered epithelium. Nomenclature refers to the shape of the surface cells only.
Stratum basale 1 Lowest and stem-cell layer of stratified epithelium.
Stratum basale 2 Lowest and stem-cell layer of stratified epithelium.
Stratum basale 3 Lowest and stem-cell layer of stratified epithelium.
Stratum basale 2 Lowest and stem-cell layer of stratified epithelium.
Stratum corneum 1 Outermost layer of the epidermis.
Stratum corneum 2 Outermost layer of the epidermis.
Stratum corneum 1 Outermost layer of the epidermis.
Stratum corneum 3 Outermost layer of the epidermis.
Stratum corneum 2 Outermost layer of the epidermis.
Stratum granulosum 1 The third-innermost layer of the epidermis. Keratin appears in the form of granules.
Stratum granulosum 1 The third-innermost layer of the epidermis. Keratin appears in the form of granules.
Stratum granulosum 1 The third-innermost layer of the epidermis. Keratin appears in the form of granules.
Stratum granulosum 2 The third-innermost layer of the epidermis. Keratin appears in the form of granules.
Stratum lucidum 3 Is present only in thick skin. The transparent-appearing layer between the stratum corneum and stratum granulosum.
Stratum lucidum 1 Is present only in thick skin. The transparent-appearing layer between the stratum corneum and stratum granulosum.
Stratum spinosum 2 Prickle cell layer. Second-innermost layer of the epidermis. Neighboring cells have many desmosomes between them.
Stratum spinosum 4 Prickle cell layer. Second-innermost layer of the epidermis. Neighboring cells have many desmosomes between them.
Stratum spinosum 1 Prickle cell layer. Second-innermost layer of the epidermis. Neighboring cells have many desmosomes between them.
Stratum spinosum 1 Prickle cell layer. Second-innermost layer of the epidermis. Neighboring cells have many desmosomes between them.
Stria vascularis 1 Epithelium producing the endolymph in the cochlea.
Stria vascularis 3 Epithelium producing the endolymph in the cochlea.
Striated (intralobular) ducts 1 The second-order duct of an exocrine gland. Mitochondria arranged in basal membrane infoldings give it a striated appearance.
Striated (secretory) duct 1 The second-order duct of an exocrine gland. Mitochondria arranged in basal membrane infoldings give it a striated appearance. May modify the secretion.
Striated (secretory) duct 1 The second-order duct of an exocrine gland. Mitochondria arranged in basal membrane infoldings give it a striated appearance. May modify the secretion.
Striated (secretory) ducts 1 The second-order ducts of exocrine glands. Mitochondria arranged in basal membrane infoldings give them a striated appearance. May modify the secretion.
Striated muscle 1 In cardiac and skeletal muscle the motor proteins are arranged in such a way that it gives a striated appearance.
Stroma 2 Connective tissue component of an organ or a tissue. Plays a supportive role.
Stroma 1 Connective tissue component of an organ or a tissue. Plays a supportive role.
Stroma of iris 2 The main bulk of the iris. Composed of connective tissue.
Stroma of vocal cord 1 The main bulk of the vocal cord. Composed of connective tissue.
Subarachnoid space 1 Space between the dura and the pia mater. Contains CSF.
Subcapsular sinus 1 In lymph nodes, the area immediately beneath the capsule. Lymphocytes enter here via the afferent lymphatics.
Subcapsular sinus 1 In lymph nodes, the area immediately beneath the capsule. Lymphocytes enter here via the afferent lymphatics.
Subcapsular sinus 1 In lymph nodes, the area immediately beneath the capsule. Lymphocytes enter here via the afferent lymphatics.
Subcapsular sinus 1 In lymph nodes, the area immediately beneath the capsule. Lymphocytes enter here via the afferent lymphatics.
Subcapsular sinus 2 In lymph nodes, the area immediately beneath the capsule. Lymphocytes enter here via the afferent lymphatics.
Subcapsular sinus 1 In lymph nodes, the area immediately beneath the capsule. Lymphocytes enter here via the afferent lymphatics.
Subcapsular sinus 3 In lymph nodes, the area immediately beneath the capsule. Lymphocytes enter here via the afferent lymphatics.
Submucosa 1 Connective tissue layer beneath the mucosa. In the GI tract it is located between the mucosa and the muscularis externa.
Submucosa 3 Connective tissue layer beneath the mucosa. In the GI tract it is located between the mucosa and the muscularis externa.
Submucosa 6 Connective tissue layer beneath the mucosa. In the GI tract it is located between the mucosa and the muscularis externa.
Submucosa 4 Connective tissue layer beneath the mucosa. In the GI tract it is located between the mucosa and the muscularis externa.
Submucosa 1 Connective tissue layer beneath the mucosa. In the GI tract it is located between the mucosa and the muscularis externa.
Submucosa 8 Connective tissue layer beneath the mucosa. In the GI tract it is located between the mucosa and the muscularis externa.
Submucosal glands 1 Glands restricted in location to the submucosa.
Submucosal glands of Brunner 1 Brunner's glands are located in the submucosa of the duodenum. Their secretory products are carried via ducts to the intestinal lumen.
Subsynaptic cisterna 1 Specialized formation or structure in some nerve endings.
Supporting cell bodies 1 Bodies of cells that provide structural support to the organ of Corti.
Supporting cell nuclei 1 Sustentacular cells of the olfactory epithelium.
Supporting cells 1 Cells that provide structural support to the organ of Corti.
Supporting Deiter cells 1 Supporting cells in the organ of Corti.
Supporting Hensen cells 1 Supporting cells in the organ of Corti.
Surface cell 1 The uppermost cells in stratified epithelia are surface cells.
Surface epithelial cells 1 Cells on a surface. The GI tract surface epithelium is simple columnar, specialized for absorption.
Surface epithelium 1 Any epithelium on a surface. The GI tract surface epithelium is simple columnar, specialized for absorption.
Surface epithelium 1 Any epithelium on a surface. The GI tract surface epithelium is simple columnar, specialized for absorption.
Surface epithelium 1 Any epithelium on a surface. The GI tract surface epithelium is simple columnar, specialized for absorption.
Surface mucous cells 1 Lining cells of the stomach lumen are called surface mucous cells because they synthesize, store, and secrete mucus.
Surface mucous cells 2 Lining cells of the stomach lumen are called surface mucous cells because they synthesize, store, and secrete mucus.
Surface mucous cells 1 Lining cells of the stomach lumen are called surface mucous cells because they synthesize, store, and secrete mucus.
Surface mucous epithelium 1 Lining cells of the stomach lumen are called surface mucous cells because they synthesize, store, and secrete mucus.
Sweat gland 1 Simple tubular coiled gland of the skin. Produces and excretse a hypotonic sodium chloride solution. Involved in thermoregulation.
Sweat gland 1 Simple tubular coiled gland of the skin. Produces and excretse a hypotonic sodium chloride solution. Involved in thermoregulation.
Sweat gland 1 Simple tubular coiled gland of the skin. Produces and excretse a hypotonic sodium chloride solution. Involved in thermoregulation.
Sweat gland cells 2 Cells of simple tubular coiled glands of the skin. Produce and excrete a hypotonic sodium chloride solution. Involved in thermoregulation.
Sweat gland lumen 1 (Self-explanatory)
Sweat gland lumen c.s. 1 (Self-explanatory)
Sweat glands 1 Simple tubular coiled glands of the skin. Produce and excrete a hypotonic sodium chloride solution. Involved in thermoregulation.
Sweat glands 2 Simple tubular coiled glands of the skin. Produce and excrete a hypotonic sodium chloride solution. Involved in thermoregulation.
Sweat glands 1 Simple tubular coiled glands of the skin. Produce and excrete a hypotonic sodium chloride solution. Involved in thermoregulation.
Synapses 1 Junctions between two neurons where signals are transmitted.
Synaptic clefts 1 Space between two communicating neurons.
Synaptic vesicles 1 Contain neurotransmitter.
Synaptic vesicles 1 Contain neurotransmitter.
Syncytiotrophoblast 1 The outermost covering of the fetal placental villi. It is formed by cytotrophoblast fusion. Lacks cell membranes in between, hence the name.
Syncytiotrophoblast 2 The outermost covering of the fetal placental villi. It is formed by cytotrophoblast fusion. Lacks cell membranes in between, hence the name.
Syncytiotrophoblast 1 The outermost covering of the fetal placental villi. It is formed by cytotrophoblast fusion. Lacks cell membranes in between, hence the name.

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