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Description: single layer or flattened
cells with disc-shaped central nuclei and
sparse cytoplasm.Simple of the epithe-
lia.
Functions: allows materials to pass by
diffusion and filtration in sites where pro-
tection is not imp.
Simple squamous epithelium Location: kidney, air sacs lungs, lining of
heart
Description: single layer of cubelike cells
with large, spherical central nuclei
Function: secretion and absorption
Location: kidney tubules, ducts and se-
cretory portions of small glands, ovary
Simple cuboidal epithelium surface
Description: single layer of talls cells with
round oval nuclei
Function: Absorption; secretion of mucus
enzymes and other substances
simple columnar epithelium Location: Digestive tract
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, Histology Exam 1 Pictures Test 2024-2025
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Description: single layer of cells of differ-
ing heights, some not reaching the free
surface.
Function: secrete substances, particular-
ly mucus
Location: upper respiratory tracts, lines
Pseudostratified columnar epithelium th trachea, sperm-carrying ducts.
Description: thick membrane composed
of several cell layers
Function: protects underlying tissues in
areas subjected to abrasion
Stratified squamous epithelium Location: esophagus, mouth and vagina.
Description: basal cells cuboidal and
columnar
Function: stretches readily,permits
stored urine to distend urinary organ
Location: lines the ureters, bladder and
Transitional epithelium part of the urethra
Description: gel-like matrix with
all three fiber types; fibroblast,
macrophages,mast cells and some white
cells.
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