Term
| Four Basic Types of Tissue |
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Definition
Epithelieum
Connective Tissue
Muscle
Nerve Tissue |
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Definition
| cells which make-up an organ |
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Term
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Definition
| CT matrix associated with epithelium |
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Term
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Definition
specialized epithelia
line specifc internal cavities without external connection
secrete a watery-type secretion |
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Term
mucosa
(muscous membrane) |
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Definition
specialized epithelia
line body w/ external connection
secrete thick viscous fluid |
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Definition
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Definition
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Definition
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Definition
| attachment to adhacent cells |
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Term
| Key Features of Epithelium |
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Definition
line surfaces of organs and tissues
little extracelluar space (contiguous, high cell density)
rest on basal lamina
*all epithelia= seperated from surrounding
=avascular |
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Term
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Definition
| protection, absorption, excretion, secretion, reception |
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Definition
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Term
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Definition
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Term
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Definition
multiple layers
(apical layer) |
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Definition
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Definition
cube
height, width length are same |
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Definition
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Term
| Simple Squamous Epithelium |
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Definition
thin cells
"bulging" nuclei
1) mesothelium
2) endotheliem: line all blood vesssels, heart, lumphatics |
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Term
| Simple Cubodial Epithelium |
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Definition
secretory/absorpative surfaces and ducts
(kidney) |
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Term
| Simple Columnar Epithelium |
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Definition
secretory/absorptive surfaces and ducts
(stomach and intestine) |
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Term
| Statified squamous Epithelium |
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Definition
thin cells stack on another
basal cell thicker
1)keratinized: apical layers hardened and cell dead (skin)
2)non-keratinized: "dead" not harderned (cornea) |
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Term
| Pseudostratified Columnar Epithelium |
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Definition
not really stratfied
all cells touch basement membrane not apical
"crowded appearance"
(trachea)
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Term
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Definition
accomodating stretching
"cobblestone"
(Bladder) |
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Term
desmosomes
(macula adherens) |
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Definition
"adhereing spot" or plaque b/t plasma membrane
structural filaments mechanically anchor the plaque |
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Term
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Definition
instead of "spot" circumscribe whole cell
terminal web- sometimes visible |
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Term
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Definition
-outer/extermal layer of plasma membrane of contigous cells share periodic points
-zonula occludens- lateral surfaces near apical border
-never visible alone |
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Term
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Definition
-minimal space b/t contigous cells
-never visible alone
-transfer messages
-channels b/t cells |
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Definition
dark staingin "spot" at apical pole
represents junctional complexes (macula adherens + zonula adherens + zonula occludens) |
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Term
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Definition
-specialized CT matrix adacent to basilar surface of epithelium
-visible with special stains only
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Term
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Definition
tiny "finger-like" projections on apical pole
highly ordered and parrellel
"brush border"
glucocalyx |
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Term
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Definition
highly motile, surface projections
finger-like but wider diameter than microvilli
basal bodies- site of "nucleation"
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Term
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Definition
few in # than cilia and longer
motile cells independen of the "parent" epithelium
(sperm cells) |
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