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SIMPLE EPITHELIA (SIMPLE CUBOIDAL (functions (secretion, absorption),…
SIMPLE EPITHELIA
SIMPLE COLUMNAR
functions
secretion
absorption
locations
digestive tract - stomach to rectum
dense microvilli on apical surface
kidney tubules
primarily cells that secrete
mucus intestinal juice
some have cilia on free surface
helps move substances
through internal passageway
SIMPLE CUBOIDAL
h=w
nuclei stain dark
functions
secretion
absorption
locations
walls of smallest ducts in glands
kidney tubules
PSEUDOSTRATIFIED COLUMNAR
common features
all cells rest on basement membrane
only tallest reach free surface
hence "pseudostratified"
short cells
-unspecialized
-produce taller cells
functions
secretion; esp. mucous
cilia propel mucous
vary in height
types
non-ciliated
sperm ducts;
ducts of large glands
ciliated
trachea; most upper
respiratory tract
SIMPLE SQUAMOUS
see separate sheet