simple squamous epithelium
DESCRIPTION
Simple squamous epithelium. Single row of flat cells Allows rapid diffusion of substances; secretes serous fluid Found in alveoli, glomeruli, endothelium, & serosa. Simple cuboidal epithelium. Single row of cube-shaped cells, often with microvilli Absorption & secretion; produces mucus - PowerPoint PPT PresentationTRANSCRIPT
BSC 1085 LProf. Rodriguez
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5 Epithelial & ConnectiveTissue
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Simple squamous epithelium
Single row of flat cellsAllows rapid diffusion of substances; secretes serous fluidFound in alveoli, glomeruli, endothelium, & serosa
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Simple cuboidal epithelium
Single row of cube-shaped cells, often with microvilliAbsorption & secretion; produces mucusLiver, thyroid, mammary, salivary and other glands, bronchioles, and most kidney tubules
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Simple columnar epithelium
Single row of tall, narrow cells
vertically oriented, oval nuclei in basal half of cell
Absorption & secretion; secretion of mucusInner lining of GI tract, uterus, kidney & uterine tubes
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Pseudostratified ciliated columnar epithelium
Single row of cells not all of which reach the free surface
nuclei of basal cells give layer a stratified look
Secretes and propels respiratory mucus Found in respiratory system
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Stratified squamous epithelium
Multilayered epithelium that lacks surface layer of dead cells forming abrasion-resistant, moist, slippery layerFound on tongue, oral mucosa, esophagus & vaginaMultilayered epithelium covered with layer of compact, dead squamous cells packed with protein keratin – epidermis of skin
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Transitional epithelium
Multilayered epithelium with rounded surface cells that flatten when the tissue is stretchedStretches to allow filling of urinary tractFound in urinary tract -- kidney, ureter, bladder
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Mesenchyme
mesoderm (middle) forms mesenchyme that gives rise to muscle, bone, blood and other connective tissues
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Areolar
Loose arrangement of collagenous and elastic fibers, scattered cell types & abundant ground substanceUnderlying all epithelia forming passageway for nerves & blood vessels; fascia between muscles
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Adipose
Large, empty-looking cells with thin margins; nucleus pressed against cell membraneEnergy storage, insulation, space filled as cushioningSubcutaneous fat beneath skin & surrounding organs
brown fat found in hibernating animals produces heat only no ATP
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Reticular
Loose network of reticular fibers and cellsForms supportive stroma (framework) for lymphatic organsFound in lymph nodes, spleen, thymus & bone marrow
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Dense regular
Densely, packed, parallel collagen fibers; compressed fibroblast nuclei & scanty open spaceTendons & ligaments hold bones together and attach muscles to bones
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Dense irregular
Densely packed collagen fibers running in random directions; scanty open space; few visible cellsWithstands stresses applied in different directions Deeper portion of skin; capsules around organs
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Hyaline cartilage
Clear, glassy matrix; fine dispersed collagen fibers; chondrocytes in small clusters enclosed in lacunaeSupports airway, eases joint movements Over ends of bones at movable joints; sternal ends of ribs; supportive material in larynx, trachea, bronchi and fetal skeleton
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Elastic cartilage
Hyaline cartilage with weblike mesh of elastic fibers amongst the lacunae; always has perichondriumProvides flexible, elastic supportExternal ear and epiglottis
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Skin Slide
On the slide findEpidermisDermisHair follicleOil glandSweat gland