epithelial Flashcards
(15 cards)
histology
study of tissues
remove tissue - biopsy.autopsy
fix tissue (prevent rot)
embed tissue in hard thing - wax
slice v v thin
stain and microscope
stain
H&E
haematoxylin and eosin
nuclei purple H
cytoplasm+ pink e
things to consider
plane tissue cut
magnification level
main tissue and purpose
epithelial cover
connective support
muscle movement
nervous control
characteristics epithelial
cover and protect
cover and lining
glandular
distinct cell surface (free lateral basal - cube)
can regenerate
avascular but nervous
classification
cell layers
simple / 1
stratified/ multiple
psueodstratified / funny shaped
cell shapes
squamous - fried egg
cuboidal - cube
columnar - column
transitional - in urinary system
changes shape (cell shape)
simple squamous
diffusion, filtration and some secretion
alveoli, kidney glomeruli, serous membrane (pericardium, peritoneum pleura)
simple cuboidal
absorption, secretion movement (cilia)
kidney tubules and terminal bronchioles
can find cilia on top
simple columnar
absorption, secretion, movement (cilia)
intestines, stomach, lungs, fallopian tubes
transitional
resemble stratified squamous or cuboidal
accommodates change in fluid volume
urinary bladder, ureter and upper part urethra
stratified squamous
flatter closer to the surface
protection against abrasion and loss of water
keratinised (water proof) sole of feet, palm of hands skin
non keratinised - mouth, esophogus, anus, vagina
stratified cuboidal
kinda rare
absorption secretion and protection
ducts of sweat and salivary grands
stratified columnar
also rare
secretion and protection
mammary glans, larynx, male urethra
pseudo stratified columnar
secretion and movement
cilia - mucus
pharynx trachea male sperm carrying ducts
doesn’t exist
simple transitional
stratified transitional
pseudo stratified squamous cuboidal transitional
