lab 1 epithelium packet Flashcards
what are the four basic tissue types found in the body?
epithelial, connective, muscular and nervous
what are the characteristics of pseudostratified columnar? (simple epithelia)
not all cells reach the free surface, shorter cells are covered over by taller ones, looks stratified, every cell reaches basement membrane
what is the purpose of simple squamous epithelia?
permits rapid diffusion or transport of substances
secretes serous fluids
which ephithelium has nuclei at several layers with cilia and goblet cells, secretes and propels mucus?
pseudostratified epithelium
which epithelia attaches to the basement membrane?
deepest layer of stratified epithelia
what is the formation of simple cuboidal epithelium? and the purpose? where is it found? LTMSGBKT
simple layer of square or round cells
absorbs and secretes, mucus production and movement
liver, thyroid, mammary, salivary glands, bronchioles, and kidney tubules
what is purpose of simple columnar epithelium? what are the cells like?
- oval nuclei in basal half of cell
- absorbs and secretes mucus
- brush border of microvilli in some organs, may possess goblet cells
where can i find epithelial tissue in the body? and the function?
- covers surface
- lining cavities
- lining tube like structure esophagus, tubes, stomach
EX. blood vessels, veins/arteries, intestines, skin, GLAND, esophagus, fallopian tube, atrium, stomach
what is one layer of epithelium cells called?
SIMPLE
what is more than one layer of epithelium cells called?
stratified
what does pseudo mean?
fake or false
does the psuedostratified reach free surface? and are shorter cells covered over by taller ones? does it look stratified? does every cell reach basement membrane?
NO
YES
YES
YES
what is transitional epithelium?
it’s very stretchy
why do we need multiple layers of the stratified cells
need more production or more protection/function
where is there multiple layers of stratified squamous ?
esophagus, vagina
what is the function of epithelium?
absorbs, secretes, transports, protects
main job of columnar epithelium ?
absorbtion
main job of cuboidal epithelium?
secrete
main job of the squamous epithelium?
transport
what is the bronchioles?
mucus
where can i find simple columnar epithelium? (think of villi during endoscopy)
kidneys, GI system, uterus & uterine
where is the nucleus in the columnar epithelium?
bottom half of cell
define pseudostratified epithelium and where is it found?
looks like stratified but it is not, where some cells reach the B.M. but not all of them
has cilia
male urethra and respiratory tract
what does keratinized stratified squamous mean?
a layer of dead cells
what is the sole of the foot?
stratified squamous and it is keratinized ; 1 layer of dead cell
what is keratinized stratified squamous ? (sole of foot)
it is 1 layer of dead cells and it is for protection and resistance to abrasion
most exposed to surface
what is the vagina classified as?
nonkeratinized
if it had dead cells , the woman would have no feelings during sexual intercourse
what is esophagus classified under? keratinized or nonkeratinized?
nonkeratinized ; it has sensations as we eat it pushes up to get food down
keratinized and nonkeratinized can only be found in the ….?
stratified squamous
what is stratified cuboidal epithelium?
2+ cell layers
secretes sweat
sperm and ovaries
what is transitional epithelium?
it is unique and multilayered
it is flat
easy to stretch , found in ureter and bladder
where else can i find simple squamous epithelium?
bowman’s capsule in kidney and lining of heart, vessels and lung
where can i find simple cuboidal cells?
kidney rubles and secretory portion of the gland
where else can i find simple columnar epithelium?
digestive from stomach to anus, duodenum and lung airways
where can i find pseudostratified columnar epithelium?
respiratory tract and some parts of the male urethra
where can i find stratified squamous epithelium?
epidermis , oral mucousa, vagina and esophagus
where can i find stratified cuboidal epithelium?
ducts of gland
where can i find stratified columnar epithelium?
urethra
where can i find transitional epithelium?
ureter and bladder
does endorcrine gland has to reach blood? is it a special kind of epithelial tissue? where can i find it in the glands? give an example
yes
kidney, pituitary, adrenal
secretes
ex. pancreas produces insulin
where can i find exocrine glands? (think what comes OUT EXO = OUT)
mucus, sweat, oil, earwax, digestive enzymes
what is merocrine secretion? where can i find it?
secretes by exocytosis
salivary glands, tear glands, pancreas, gastric glands
what is apocrine gland?
part of gland is pinched off
found in axillary, sweat and mammary gland
what is the holocrine secretion?
rupture of plasma membrane
releases the entire cell contents into lumen and kills cell
ex sebaceous gland
two categories of the exocrine glands
unbranched duct (simple)
branched duct (compound)
tubular glands?
like a tube
acinar glands?
dilated sac
what is tubulesacinar?
glands have features of both tubular and acinar glands
