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 "L":

Object Name # of Images Description
Lamina densa 1 In the EM the basal lamina appears to have two layers. The densa is the darker-staining.
Lamina elastica interna 1 Border between intima and media in a muscular artery.
Lamina elastica interna 1 Border between intima and media in a muscular artery.
Lamina propria 1 The connective tissue under the epithelia.
Lamina propria 1 The connective tissue under the epithelia.
Lamina propria 1 The connective tissue under the epithelia.
Lamina propria 7 The connective tissue under the epithelia.
Lamina propria 8 The connective tissue under the epithelia.
Lamina propria 4 The connective tissue under the epithelia.
Lamina rara 1 In the EM the basal lamina appears to have two layers. The rara is the lighter-staining.
Lamina spiralis ossea 1 The spiral limbus that produces the tectorial membrane rests on this lamina. Part of the organ of Corti in the inner ear.
Large veins 1 Carries (usually deoxygenated) blood toward the heart.
Large veins (inside C.L.) 1 Carries (usually deoxygenated) blood toward the heart.
Lateral infoldings, cell membra 1 Cell membrane infoldings. Participate in holding cells together.
Lens 2 Transparent, refracting, part of the focusing apparatus of the eye.
Lens (broken) 1 (Self-explanatory)
Lens bow 1 Area where lens epithelium is pushed into the lens proper and will form new lens fibers. This process continues in adult life.
Lens bow - cell nuclei 1 Area where lens epithelium is pushed into the lens proper and will form new lens fibers. This process continues in adult life.
Lens capsule 1 Surrounds the lens and is impermeable to almost everything except oxygen and nutrients. It is the basal lamina of the lens epithelial cells.
Lens fibers 2 Substance of the lens. Lack organelles except for cell to cell contacts.
Leydig cell 1 Found in the interstitium of the testes. Produces testosterone.
Leydig cells 1 Found in the interstitium of the testes. Produce testosterone.
Leydig cells 1 Found in the interstitium of the testes. Produce testosterone.
Leydig cells 2 Found in the interstitium of the testes. Produce testosterone.
Leydig cells 1 Found in the interstitium of the testes. Produce testosterone.
Leydig cells 1 Found in the interstitium of the testes. Produce testosterone.
Limbus spiralis 1 This structure produces the tectorial membrane in the organ of Corti.
Limbus spiralis 1 This structure produces the tectorial membrane in the organ of Corti.
Limiting plate 1 Surrounds the portal triad. May serve as a stem cell layer for hepatocyte formation. Damaged livers with intact limiting plates are more capable of regeneration.
Limiting plate 1 Surrounds the portal triad. May serve as a stem cell layer for hepatocyte formation. Damaged livers with intact limiting plates are more capable of regeneration.
Lines of Retzius 1 Enamel is incrementally deposited. The lines resemble conceptually the rings on a tree.
Lipid droplets 2 Intracellular deposits (with no membrane) of triacylglycerols and associated lipids. The liver is very active in the synthesis of triacylglycerols and cholesterol.
Lipid droplets 1 Intracellular deposits (with no membrane) of triacylglycerols and associated lipids. The liver is very active in the synthesis of triacylglycerols and cholesterol.
Lipid droplets 1 Intracellular deposits (with no membrane) of triacylglycerols and associated lipids. The liver is very active in the synthesis of triacylglycerols and cholesterol.
Lipid droplets w/ no membrane 1 Intracellular deposits (with no membrane) of triacylglycerols and associated lipids. Steroid-secreting tissues like the adrenal gland use the lipids as a precursor.
Lipocyte 1 Cell in the liver that produces collagen and stores vitamin A.
Lipofuschin pigment 1 Brown pigment present in many kinds of cells. Represents indigestible material. Prominent in neurons and cardiac muscle cells that do not divide and disperse their cytoplasmic contents.
Lipoprotein particles 1 Abundant in liver, the major site of lipoprotein synthesis.
Liquor folliculi 1 Liquid contained in the developing follicles of the ovary.
Liver parenchymal cells 1 Hepatocytes proper. The typical cell of the liver.
Liver parenchymal cells 1 Hepatocytes proper. The typical cell of the liver.
Liver parenchymal cells 1 Hepatocytes proper. The typical cell of the liver.
Lobe 1 Segment of a parenchyma. Physically separated or defined by anatomical landmarks. Each lobe is composed by various numbers of lobules.
Lobulated nucleus 1 Nuclei of mature leukocytes tend to be lobulated. Megakaryocytes (platelet forming cells) also have lobulated nuclei.
Lobule 2 A small lobe. A prismatic or pyramidal segment of a parenchyma more or less clearly delimited by connective tissue. Several lobules constitute a lobe.
Longitudinal muscle fibers 1 (Self-explanatory)
Longitudinal muscle layer c.s. 1 The outermost layer of the musculature of the intestine. Usually smooth muscle except for the esophagus and the perianus.
Loops of Henle (short nephron) 1 There are two kinds of nephrons in the kidney, short and long. The epithelium in the loop of Henle in the short nephrons is the thick, ascending distal tubule kind. The long nephrons have thin squamous epithelial lining.
Loose connective tissue 1 Has numerous cells and few fibers. Cells readily migrate through loose connective tissue.
Lower jaw 1 Mandible
Lower lip 1 (Self-explanatory)
Lumen 1 Hollow space in the interior of a tube.
Lumen 1 Hollow space in the interior of a tube.
Lumen 1 Hollow space in the interior of a tube.
Lumen of afferent or efferent 1 Afferent or efferent arteriole of the vascular pole of the renal corpuscle.
Lumen of crypt 1 Hollow space in the interior of a tube.
Lumen of fenestrated capillary 1 Capillaries of the choroid plexus, intestine, and endocrine glands in general are fenestrated. This can be better seen in a higher power TEM view.
Lumen of nuclear envelope 1 Space between two nuclear membranes.
Lumen of pancreatic duct 1 (Self-explanatory)
Lumen of rete testis 1 Irregularly shaped hollow space in the rete testis.
Lumen of semicircular canal 1 In the vestibular apparatus of the inner ear. Important in balance.
Lumen of seminal vesicle 1 Since the epithelium has elaborate infoldings it might appear that the lumen is discontinuous, but that isn't the case.
Lumen with spermatozoa 1 The lumen of the vas deferens may be packed full, as in this view.
Lumen, exocrine acinus 1 Formed by the acinar cells and the tight junctions between their apical cell surfaces. The contents of the lumen eventually flow into a duct.
Lumina of collecting ducts 1 (Self-explanatory)
Lumina of glands 1 Hollow spaces in the interior of a tube.
Lumina of proximal tubules 1 (self-explanatory)
Lumina of RER 1 Contain protein destined for export or delivery to lysosomes.
Lumina of RER 2 Contain protein destined for export or delivery to lysosomes.
Lumina of sinusoids 1 (Self-explanatory)
Lumina of thin limbs 1 (Self-explanatory)
Lumina of vasa recta 1 (Self-explanatory)
Lung parenchyma 1 The respiratory portions of the lung.
Lung parenchyma 1 The respiratory portions of the lung.
Lung parenchyma 1 The respiratory portions of the lung.
Lung parenchyma 1 The respiratory portions of the lung.
Lymph node capsule 1 Connective tissue surrounding the lymph node.
Lymph node cortex 1 Sometimes one can distinguish a cortex and medulla in a lymph node. The cortex usually contains several germinal centers.
Lymph node cortex 1 Sometimes one can distinguish a cortex and medulla in a lymph node. The cortex usually contains several germinal centers.
Lymph node cortex 1 Sometimes one can distinguish a cortex and medulla in a lymph node. The cortex usually contains several germinal centers.
Lymph node medulla 1 Sometimes one can distinguish a cortex and medulla in a lymph node. The medulla is said to contain lymphatic sinuses and cellular cords.
Lymph node medulla 1 Sometimes one can distinguish a cortex and medulla in a lymph node. The medulla is said to contain lymphatic sinuses and cellular cords.
Lymph node stroma 1 Strictly speaking, stroma refers to the fibrous component only (dark-staining in this silver-stained section).
Lymph nodule 2 A ball having a lighter-staining center. This is a place for B-cell production.
Lymph nodule 3 A ball having a lighter-staining center. This is a place for B-cell production.
Lymph nodule 1 A ball having a lighter-staining center. This is a place for B-cell production.
Lymph nodule 4 A ball having a lighter-staining center. This is a place for B-cell production.
Lymph vessel lumina 1 Hollow spaces in the interior of a tube.
Lymphatic 1 Transport lymph and macromolecules from the tissues. Lymphatic vessels are an important supplement to the veins in returning fluids to the heart.
Lymphatic 5 Transport lymph and macromolecules from the tissues. Lymphatic vessels are an important supplement to the veins in returning fluids to the heart.
Lymphatic 3 Transport lymph and macromolecules from the tissues. Lymphatic vessels are an important supplement to the veins in returning fluids to the heart.
Lymphatic 3 Transport lymph and macromolecules from the tissues. Lymphatic vessels are an important supplement to the veins in returning fluids to the heart.
Lymphatic (emptied portion) 1 This is a picture of a lymphatic valve in action. You should also look at the filled portion. The lymph has flowed from the emptied to the filled portion of the vessel. The valve prevents back flow.
Lymphatic (filled portion) 1 This is a picture of a lymphatic valve in action. You should also look at the emptied portion. The lymph has flowed from the emptied to the filled portion of the vessel. The valve prevents back flow.
Lymphatic capillaries 1 Transport lymph and macromolecules from the tissues. Lymphatic vessels are an important supplement to the veins in returning fluids to the heart.
Lymphatic sinuses 1 The medulla of a lymph node is said to be composed of sinuses (or sinusoids) and cellular cords. The sinuses eventually lead into the efferent lymphatic vessels.
Lymphatic sinusoids 3 The medulla of a lymph node is said to be composed of sinuses (or sinusoids) and cellular cords. The sinuses eventually lead into the efferent lymphatic vessels.
Lymphatic valve 1 Prevents backflow of the contents of lymphatic vessels.
Lymphatic valve 1 Prevents backflow of the contents of lymphatic vessels.
Lymphatic valve 1 Prevents backflow of the contents of lymphatic vessels.
Lymphatic vessel 2 Transport lymph and macromolecules from the tissues. Lymphatic vessels are an important supplement to the veins in returning fluids to the heart.
Lymphatic vessel 3 Transport lymph and macromolecules from the tissues. Lymphatic vessels are an important supplement to the veins in returning fluids to the heart.
Lymphatic vessel 3 Transport lymph and macromolecules from the tissues. Lymphatic vessels are an important supplement to the veins in returning fluids to the heart.
Lymphatic vessel 1 Transport lymph and macromolecules from the tissues. Lymphatic vessels are an important supplement to the veins in returning fluids to the heart.
Lymphatic vessel 3 Transport lymph and macromolecules from the tissues. Lymphatic vessels are an important supplement to the veins in returning fluids to the heart.
Lymphatic vessel 6 Transport lymph and macromolecules from the tissues. Lymphatic vessels are an important supplement to the veins in returning fluids to the heart.
Lymphatic vessel lumen 1 Hollow space in the interior of a tube.
Lymphatic vessel lumen 1 Hollow space in the interior of a tube.
Lymphatic vessel wall 1 (Self-explanatory) In general the walls of the lymphatic vessels are much thinner than the accompanying blood vessels.
Lymphatic vessel with valve 1 Lymphatic vessels typically have frequent valves to prevent backflow. The presence of valves provides a convenient way of identifying small lymphatics.
Lymphatic vessel with valve 1 Lymphatic vessels typically have frequent valves to prevent backflow. The presence of valves provides a convenient way of identifying small lymphatics.
Lymphatic vessel with valve 1 Lymphatic vessels typically have frequent valves to prevent backflow. The presence of valves provides a convenient way of identifying small lymphatics.
Lymphatic vessels 3 Transport lymph and macromolecules from the tissues. Lymphatic vessels are an important supplement to the veins in returning fluids to the heart.
Lymphatic vessels 2 Transport lymph and macromolecules from the tissues. Lymphatic vessels are an important supplement to the veins in returning fluids to the heart.
Lymphatics 1 Transport lymph and macromolecules from the tissues. Lymphatic vessels are an important supplement to the veins in returning fluids to the heart.
Lymphatics 3 Transport lymph and macromolecules from the tissues. Lymphatic vessels are an important supplement to the veins in returning fluids to the heart.
Lymphatics 1 Transport lymph and macromolecules from the tissues. Lymphatic vessels are an important supplement to the veins in returning fluids to the heart.
Lymphatics 1 Transport lymph and macromolecules from the tissues. Lymphatic vessels are an important supplement to the veins in returning fluids to the heart.
Lymphatics of rete testis 1 The rete testis is particularly rich in lymphatics.
Lymphocyte 4 These are the key players of the immune system. There are many different categories of lymphocytes. Unfortunately in the LM with ordinary staining methods they all tend to look alike. Typically they have a large nucleus with little cytoplasm.
Lymphocyte 1 These are the key players of the immune system. There are many different categories of lymphocytes. Unfortunately in the LM with ordinary staining methods they all tend to look alike. Typically they have a large nucleus with little cytoplasm.
Lymphocyte 1 These are the key players of the immune system. There are many different categories of lymphocytes. Unfortunately in the LM with ordinary staining methods they all tend to look alike. Typically they have a large nucleus with little cytoplasm.
Lymphocyte 1 These are the key players of the immune system. There are many different categories of lymphocytes. Unfortunately in the LM with ordinary staining methods they all tend to look alike. Typically they have a large nucleus with little cytoplasm.
Lymphocyte 7 These are the key players of the immune system. There are many different categories of lymphocytes. Unfortunately in the LM with ordinary staining methods they all tend to look alike. Typically they have a large nucleus with little cytoplasm.
Lymphocyte (large) 1 Ordinary histological methods can only distinguish between large and small lymphocytes. Natural Killer cells (NK) are large lymphocytes with granules visible. These cells are also called large granular lymphocytes. Not all large lymphocytes are NK cells.
Lymphocyte aggregation 1 Accumulation of lymphocytes may occur when need arises. This occurs especially in the GI tract.
Lymphocyte? 1 Cells that may be lymphocytes located in the olfactory epithelium. Intraepithelial lymphocytes occur in many epithelia. Most of them may be the gamma/delta type.
Lymphocytes 1 These are the key players of the immune system. There are many different categories of lymphocytes. Unfortunately in the LM with ordinary staining methods they all tend to look alike. Typically they have a large nucleus with little cytoplasm.
Lymphocytes 2 These are the key players of the immune system. There are many different categories of lymphocytes. Unfortunately in the LM with ordinary staining methods they all tend to look alike. Typically they have a large nucleus with little cytoplasm.
Lymphocytes 5 These are the key players of the immune system. There are many different categories of lymphocytes. Unfortunately in the LM with ordinary staining methods they all tend to look alike. Typically they have a large nucleus with little cytoplasm.
Lymphocytes 7 These are the key players of the immune system. There are many different categories of lymphocytes. Unfortunately in the LM with ordinary staining methods they all tend to look alike. Typically they have a large nucleus with little cytoplasm.
Lymphocytes 6 These are the key players of the immune system. There are many different categories of lymphocytes. Unfortunately in the LM with ordinary staining methods they all tend to look alike. Typically they have a large nucleus with little cytoplasm.
Lymphocytes in lamina propria 1 The loose connective tissue of the lamina propria allows ready migration of other cells.
Lymphocytes passing through 1 These are lymphocytes in action, passing through the wall of the high endothelial cell venule.
Lymphoid aggregation 1 Accumulation of lymphocytes may occur when need arises. This occurs especially in the GI tract.
Lymphoid aggregation 2 Accumulation of lymphocytes may occur when need arises. This occurs especially in the GI tract.
Lymphoid aggregations 1 Accumulations of lymphocytes may occur when need arises. These occur especially in the GI tract.
Lysosome 1 Intracellular vesicle containing hydrolytic enzymes. Segregation of their contents prevents damage to the cell itself.
Lysosomes 2 Intracellular vesicles containing hydrolytic enzymes. Segregation of their contents prevents damage to the cell itself.
Lysosomes 4 Intracellular vesicles containing hydrolytic enzymes. Segregation of their contents prevents damage to the cell itself.
Lysosomes 5 Intracellular vesicles containing hydrolytic enzymes. Segregation of their contents prevents damage to the cell itself.
Lysosomes and peroxisomes 1 Small intracellular granules. With the LM it is impossible to identify them accurately.
Lysosomes and/or peroxisomes 2 Small intracellular granules. With the LM it is impossible to identify them accurately.
Lysozyme secreting cell 1 Lysozyme is an enzyme that hydrolyzes components of bacterial cell walls. They are found in the GI tract, especially in the cardiac stomach. They are most effective here at killing bacteria entering by mouth.
Lysozyme secreting glands 1 Glands composed of lysozyme secreting cells. Found in cardiac stomach.

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