Epithelial Tissue Flashcards
[epithelial tissue classification]
by shape:
- squamous
- cuboidal
- columnar
- transitional
[mesothelial/mesothelium]
outer covering of the lungs
pleura
[mesothelial/mesothelium]
outer covering of the heart
pericardium
[types of junctional complexes]
function:
- provides points linking the cytoskeleton of adjacent cells
- strengthens & stabilizes nearby tight junctions
adherent junction
six (6) classification of functional epithelium
- mesothelium
- endothelium
- myoepithelium
- endometrium
- germinal epithelium
- glandular epithelium
five (5) types of junctional complexes
- occluding/tight junction
- adherent junction
- desmosome
- hemidesmosome
- gap junction
[functional epithelium classification]
- muscle
- outer covering of muscles
myoepithelium
[identify what type of epithelial tissue based on the examples]
- non-keratinized: vagina, cervix, mouth, esophagus
- keratinized: skin
a. stratified squamous
b. stratified columnar
c. pseudostratified columnar
d. simple squamous
a. stratified squamous
lie at the end of the basement membrane
epithelial tissue
[identify what type of epithelial tissue based on the examples]
ducts of the gland, lining of kidney tubules
a. simple columnar
b. simple cuboidal
c. simple squamous
d. stratified columnar
b. simple cuboidal
helps propel foreign substances
cilia
[types of junctional complexes]
function:
- passageway of water & solute
- seal of adjacent cells to each other (sub-function)
occluding/tight junction
[identify what type of epithelial tissue based on the examples]
ducts of sweat glands
a. transitional
b. stratified columnar
c. simple squamous
d. stratified cuboidal
d. stratified cuboidal
[epithelial tissue classification]
arrangement:
It looks like a stack of layers, but it is actually a single layer
pseudostratified epithelium
[types of junctional complexes]
function:
- provides points of strong intermediate filament coupling between adjacent cells, strengthening the tissue
desmosome
- Secretion (e.g glands)
- Gas exchange (e.g alveoli in the lungs)
- Lubrication between two surfaces (e.g pleura, peritoneum, pericardium)
epithelial tissue
[type of junctional complexes]
protein complexes:
- connexin
- connexon
gap junction
a step before a cell becomes cancerous
metaplasia
[identify what type of epithelial tissue based on the examples]
urinary bladder, urinary tract
a. simple squamous
b. stratified squamous
c. transitional
d. pseudostratified columnar
c. transitional
[type of junctional complexes]
protein complexes:
- occludins
- claudins
- ZO proteins
occluding/tight junction
- not capable of movement
- capable of sensation
- mostly found in the ears
- they vibrate
stereocilia
Absorption of material from a lumen (e.g. kidney tubules, small and large intestines)
epithelial tissue
[epithelial tissue classification]
arrangement:
has 1 layer
simple epithelium
[epithelial tissue classification]
shape:
- elongated
- column-like shape
columnar
hair-like structure
cilia
- found in blood cells
- serve as an “ID” for cells
glycocalyx
[mesothelial/mesothelium]
outer covering of the digestive
peritoneum
[types of junctional complexes]
function:
- anchors cytoskeleton to the basal lamina
hemidesmosome
another term for gap junction
nexus
- Made up of compact cells
- Lie on the basement membrane
- Avascular
- Undergo metaplasia
epithelial tissue
[type of junctional complexes]
protein complexes:
- cadherin family proteins
- desmogleins, desmocollin
desmosome
- present in the skin
- prevents loss of water
keratin
[epithelial tissue classification]
arrangement:
has 2 or more layers
stratified epithelium
[functional epithelium classification]
- “secretions”
- constitutes your glands
glandular epithelium
three (3) important protein complexes of zonula occludens
- occludins
- claudins
- ZO protein
another term for adherent junction
zonula adherens
[epithelial tissue classification]
shape:
- flat
- scale-like
squamous
[functional epithelium classification]
outer covering of the uterus
endometrium
having no blood supply
avascular
[functional epithelium classification]
- “in-between”
- tissues in between organs
mesothelium
[identify what type of epithelial tissue based on the examples]
- trachea (ciliated)
a. stratified columnar
b. simple columnar
c. stratified cuboidal
d. pseudostratified columnar
d. pseudostratified columnar
four (4) fundamental types of tissue
- epithelial tissue
- muscle tissue
- connective tissue
- nervous tissue
[types of junctional complexes]
function:
- allows direct transfer of small molecules and ions from one cell to another
gap junction
empty space
lumen
presence of cilia
pseudostratified epithelium
[etymology]
“sweet”, “shell”
glycocalyx
[functional epithelium classification]
inner lining of blood vessels
endothelium
[type of junctional complexes]
protein complexes:
- integrins
hemidesmosose
Lines the internal and covers the external surfaces of the body
epithelial tissue
another term for occluding/tight junction
zonula occludens
another term for desmosome
macula adherens
Transportation of material along a surface (e.g. ciliation in the trachea)
epithelial tissue
group of cells
tissue
[epithelial tissue classification]
by arrangement:
- simple epithelium
- stratified epithelium
- pseudostratified epithelium
three (3) types of mesothelial/mesothelium tissue
- pleura
- peritoneum
- pericardium
[type of junctional complexes]
protein complexes:
- e-cadherin
- catenin complexes
adherent junction
seven (7) functions of tissue
- protection
- secretion
- absorption
- excretion
- filtration
- diffusion
- sensory reception
[identify what type of epithelial tissue based on the examples]
- male urethra
a. stratified columnar
b. transitional
c. pseudostratified columnar
d. simple columnar
a. stratified columnar
[functional epithelium classification]
found in the egg cell
germinal epithelium
[epithelial tissue classification]
shape:
can transition to any shape
transitional
[identify what type of epithelial tissue based on the examples]
lining of Loop of Henle, Alveoli, Blood vessels
a. simple cuboidal
b. simple squamous
c. simple columnar
d. stratified squamous
b. simple squamous
another term for hemidesmosome
none
digestion & absorption of intestinal contents
microvilli / brush border
[identify what type of epithelial tissue based on the examples]
uterine tube, lining of stomach, gall bladder (non-ciliated), fallopian tube (ciliated), small intestine (w/microvilli)
a. stratified squamous
b. simple squamous
c. simple columnar
d. simple cuboidal
c. simple columnar
[epithelial tissue classification]
shape:
square-like
cuboidal
Protects the body from abrasion and injury (e.g skin, esophagus)
epithelial tissue
