Epithelium Flashcards
5 types of tissues
epithelial, connective, muscle, nervous and specialized tissues
large sheets of cells
epithelial tissues
cutaneous membranes (outer)
ectoderm
mucuos membrane (inner)
endoderm
vessels and open spaces (middle)
mesoderm
et lining vessels in the lymphatic and cardiovascular system is called
endothelium
et forming the serous membranes lining the true cavities is called
mesothelium
highly cellular
epithelial
specialized intracellular connections called
cell junctions
nutrients enter the tissue by diffusion or absorption
avascular
special tissue function
protection and secretion
extensions of the apical membrane
cilia
cell types
squamous, columnar, cuboidal
thin scales, flat
squamous cells
square like/cube-like
cuboidal cells
longer than wide, rectangular
columnar cells
single layer of flat cells resembling scales of fish
simple squamous epithelium
tissue classification based on cell shape
squamous, cuboidal, columnar epithelial tissue
tissue classification based on cell layers
simple and stratified epithelial tissues
compose of one layer
simple epithelial tissues
made up of two or more layers
stratified epithelial tissues
tissue classification based on cell type and cell layer
simple and stratified epithelial tissues
simple epithelial tissues
simple squamous, simple cuboidal, simple columnar
location of simple squamous epithelium
pulmonary alveoli, Bowman’s capsule, loop of Henle, endothelium of blood and lymphatic vessels, mesothelium
function of simple squamous epithelium
lines blood vessel
single layer of cube-shaped cells with large, central nuclei
simple cuboidal epithelium
function of simple cuboidal epithelium
secretion and absorption
location of simple cuboidal epithelium
thyroid follicles, kidney tubules, glands and their ducts
single layer of tall cells with round to oval nuclei
simple columnar epithelium
function of simple columnar epithelium
absorption and secretion
location of simple columnar epithelium
non-ciliated type lines most of the digestive tract
stratified epithelial tissues
stratified squamous, cuboidal and columnar
2 or more layers of cells
stratified squamous epithelium
function of stratified squamous epithelium
protects underlying tissues in areas subjected to abrasion
location of stratified squamous epithelium
nonkeratinized type forms the moist linings of the esophagus, mouth and vagina
typically lines the larger ducts of glands
stratified cuboidal epithelium
location of stratified cuboidal epithelium
ducts of sweat glands
consists of columnar surface cells
stratified columnar epithelium
function of stratified columnar epithelium
protection and secretion