Term
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Definition
-Specialized areas of the cell mem link individual cells together to from tissues and organs
-Occluding (tight) jncts="stitched"
-Anchoring (adhering) jncts=mechanical strength
-Communicating (gap) jncts=allows mov't of mol. b/w cells |
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Term
| Simple Squamous Epithelium |
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Definition
-Nuc flattened & cytoplasm indistinct
-Slick surface facilitates flow of fluids |
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Term
| Simple Cuboidal Epithelium |
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Definition
-Cell height & width are the same
-Nuc is centrally placed
-Secretory part of exocrine gland |
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Term
| Simple Columnar Epithelium |
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Definition
-Cell height > width
-Nuc arranged in an ordered layer
-Specialized for absorption & secretion (digestive system-villi of duodenum) |
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Term
| Stratified Squamous Epithelium |
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Definition
-Flat squames on surface
-Cells in the basal/middle layers are not flattened
-Found where there is high wear & tear (high cell turnover)
-May be keratinised
-Esophagus, foot pad |
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Term
| Transitional Epithelium (urothelium) |
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Definition
-Unique to renal pelvis, ureters, bladder
-Stretches w/o rupture
-Relaxed surface cells appear cuboidal, stretched appears squamous |
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Term
| (Ciliated) Pseudo-Stratified Columnar Epithelium |
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Definition
-Position of nuc gives stratified appearance
-All cells are in contact w/ basement mem
-Presence of cilia
-Respiratory epithelium
-Goblet cells |
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Term
| Stratified Cuboidal Epithelium |
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Definition
-Multiple cuboidal layers
-Found in lining of ducts of exocrine glands |
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Term
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Definition
-Produces mucus
-Sg cell gland |
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Term
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Definition
-Un-branched duct system
-Tubular=simple, coiled (sweat gland), branched
-Alveolar=simple acinar (drop), simple branched acinar (grapes) |
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Term
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Definition
-Branched duct system
-Tubular=compound tubular (2 peace signs)
-Alveolar=compound acinar (4 olive fingers)
-Tubuloacinar=combo (finger, olive, finger, olive)ex lactating mammary gland |
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Term
| Serous Glandular Epithelium |
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Definition
-Produces a thin watery product
-Nuc usually near center of cell
-Apical cytoplasm filled w/ secretory granules
-In exocrine part of pancreas |
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Term
| Mucous Glandular Epithelium |
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Definition
-Produces a thick mucin
-Cells appear pale w/ H&E
-Nuc flattened & on outside of cell
-Esophageal mucous secretory gland |
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Term
| Seromucous (mixed) Glandular Epithelium |
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Definition
-Produces both thin and thick secretions
-Some glands have intermixed cell types
-Commonly serous outside the mucous
-Submandibular salivary gland |
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Term
| Merocrine (eccrine) Secretion |
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Definition
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Term
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Definition
-Bud their secretions off through the plasma membrane producing membrane bound vesicles in the lumen
-Needs rejuvenation |
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Term
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Definition
-Rupture of the plasma membrane releasing the cellular contents into the lumen
-Waterproofing hair |
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