Tissues Flashcards
Function of epithelial tissue
covers surfaces and separates compartments
3 types of cell-cell junctions
desmosomes
tight junctions
gap junctions
cell- ECM junction
hemidesmosomes
what do desmosomes do
provide firm anchorage
what do tight/ occluding junctions do
seal intracellular spaces
what do gap junctions do
allow for cell-cell communication
3 types of simple epithelial
squamous - thin for easy diffusion
columnar -when ciliated, move mucus
cuboidal- perform secretion and absorption
where is simple squamous epithelial found
alveoli and capillaries
where is simple cuboidal epithelial found
lining of nephrons
where is simple columnar epithelial found
lining of digestive tract
3 types of stratified epithelium
squamous - thick, and layers can de sloughed off to allow new growth
columnar - protection and secretion
cuboidal -protection
where is stratified squamous epithelial found
epidermis
where is stratified cuboidal epithelial found
ducts of sweat glands
where is stratified columnar epithelial found
pharynx
describe the epithelial componenets of the liver
hepatocytes
arranged in rows between blood vessels
multiple functions including secretion
support epithelial cells line blood vessels and bile ducts