Epithelia tissues
이 집합의 용어 (16)
single layer of cell
Simple
Multiple-layers of cell
Stratified cells
flattened looking cell
Squamous cells
cube like cell
Cuboidal cell
column looking cell ( tall )
columnar cell
Single layer of flat cells
Location - usually forms membranes ( lungs, kidneys, heart, blood vessels)
Lines body cavities
Lines lungs and capillaries
Functions in diffusion, filtration, or secretion in membranes
Simple squamous
Single layer of cube like cells
location: kidney tubules, ovary surface, and secretory proportion of small glands
Functions in secretion and absorption; ciliated types propel mucus or reproductive cells
Common in glands and their ducts
Simpple cuboidal
Single layer of tall cells
Often includes mucus-producing goblet cells
Location: Somache and digestive track (intestines)
Some of them have microvilli to increase surface area for absorption.
Functions in secretion and absorption; ciliated types propel mucus or reproductive cells
Simple columnar
Single layer, but some cells are shorter than others
Often looks like a double layer of cells but all cells rest on the basement membrane
Location: respiratory tract (trachia) non ciliated location is the male urethra
Funchtion: secretion, particularly of mucus; propulsion of mucus by ciliary action
psudostratified columnar Epithilium
Multiple layers of cells
Cells at the apical surface are flattened
Functions as a protective covering where friction is common
Location: Lining of skin, mouth, and esophagus
Stratified squamous
two layers of cuboidal cells
functions in protection
Rare to find in the human body
Found mainly in ducts of large glands
Stratified cuboidal
surface cells are taller, cells underneath vary in size and shape
functions in protection
Rare to find in the human body
Found mainly in ducts of large glands
Stratified Columnar
Composed of modified stratified squamous epithelium
Shape of cells depends upon the amount of stretching
Functions: in stretching and the ability to return to normal shape
Lines the ureter, bladder, and parts of the urethra
Transitional Epithelia
Extra
One or more cells responsible for secreting a particular product
Secretions contain protein molecules in an aqueous (water-based) fluid
Glands
Extra
Ductless since secretions diffuse into blood vessels
All secretions are hormones
Endocrine
Extra
Secretions empty through ducts to the epithelial surface
Include sweat and oil glands
Exocrine