Epithelial Cells Flashcards
Characteristics of Epithelial tissue
- mostly composed of cells
2.Covers body surfaces and forms glands - Has distinct Surfaces
- Cells connect to surrounding cells and extracellular matrix
5 NON VASCULAr - Highly regenrative
Free surfaces
cells exposed and not attached to other cells
lateral surfaces
cells attached to other epithelial cells
basal surfaces
at base of tissue, attached to basement memrbane
basement membrane
extracellular matrix secreted by connective and epithelial tissue, connects epithelial tissue to other tissues
functions of epithelial cells
- protection of underlying structure
- acts as a barrier
- permits passage of substances
- secretion
- absorption
simple
one layer
stratified
more than one layer
pseudostratified
appears to have more than one lyaer bc cells are different heights but only one layer
transitional
special type of stratified, changes shape as cells stretch
squamous
cells are flat and scale like
cuboidal
cells are cube shape
columnar
shaped like columns
simple layer function
diffusion, filtration, secretion, absorption
stratified layer function
protection (particularly against abrasian)
squamous shape function
diffusion and acts like a filter
cuboidal and columnar shape function
secretion and absorption
simple squamous locations
Lining of blood vessels,serous membranes, aveolis, loope of helene, inner surface of ear drum
functions of simple squamous
diffusion and filtration
some protection against abrasion
secretion and absorption
locations of simple cuboidal
kidney tubules
glands and ducts
choroid plexus of brain
lining of terminal bronchioles
surface of ovaries
functions of simple cuboidal
absoprtion in kidneys
secretions in choroid plexus
movement of mucous in bronchioles
some simple cuboidal have cilia/microvili–true or false
true
simple columnar location
glands and ducts
bronchioles of lungs
auditory tubes
uterus and uterine tubes
stomach, intestines, gall bladder
bile ducts
ventricles of brain
some simple columnar have cilia and microvili–true or false
true
simple columnar functions
movement of particles out of the bronchioles
movement of oocytes
secretion in glands of stomach
absorption in intestines
stratified squamous locations
mosit–mouth, throat, layrnx,esopohagus, vagina, inferior urethra, cornea
kertanized –skin
function of stratified squamous
PROTECTION–against abrasion, chemicals and infection and water loss
stratified cuboidal locations
sweat glands, ovarian follicular cells, salavaiary gland ducts
stratified cuboidal function
secretion, absoroption, and prtoection against infection
stratified columnar epithelium location
mammary gland duct, larynx, portion of male urethra
function of stratified columnar
protection and secretion
pseudostratified columnar locations
nasal cavity, nasal sinuses, auditory tubes, pharnx, trachea, and bronchi of lungs
pseudostratified columnar function
secrete mucus onto free surface
move mucuous
pseudostratified columnar almost always has cilia true or false
true
tranisitonal epithelium locations
urinary bladdder, uterers, superior urethra
fuctions of transitional epithelium
accomodates fluctuation of volume of fluid
