Ch 5: Epithelium Tissues and Glandular Epithelium Flashcards
Epithelial Tissue
all epithelial tissue is avascular; cells too close together for blood vessels to pass
through; diffusion of nutrients and wastes can pass through
cells rest on a basement membrane
classified by number of layers and shape of cells
how many layers does a simple epithelial tissue have
1
how many layers is pseudo stratified
one layer that looks like multiple layers
what do the squamous layers look like
flat layers
cuboidal
cube
columnar
column
what is the structure of simple squamous
one layer of flat cells
what is the structure of simple cuboidal
one layer of cube cells
what is the structure of simple columnar
one layer of column cells
what is the structure of stratified squamous
many layers of flat cells; basal layer touches basement membrane
what is the structure of stratified cuboidal
many layers of cube cells; basal layer touches basement membrane;
what is the structure of transitional
many layers of cube cells that stretch and recoil; basal layer
touches the basement membrane;
what is the structure of stratified columnar
many layers of column cells
what is the structure of pseudostratified columnar
one layer of column cells that look like many
layers; all cells touch basement membrane;
glandular epithelium
(Exocrine Glands); classified by shape; duct system; type of secretion; and mechanism of secretion
tubular
elongated
acinar
round/grape like
alveolar
round
simple duct system
unbranched
compound duct system
branched
serous secretion
watery
mucous secretion
mucous
mixed secretion
both serous and mucous
holocrine
whole cell destruction; sebaceous/oil gland
apocrine
apical/top of cell destruction; goblet cell
merocrine
no cell destruction; pancreatic cell
simple tubular
sweat gland
compound acinar
mammary gland
compound tubuloacinar
pancreas
what is the structure of desmosome
some extracellular space, with areas of dense fibers
what is the structure of tight junction
cell membranes come very close together;
what is the structure of gap junction
consists of 1.5nm diameter channels that link the cytosol of adjacent cells;
what is the function of simple squamous
simple diffusion
where is simple squamous located
blood vessels
Alveoli of lungs
what is the function of simple cuboidal
storage and secretion
where is simple cuboidal located
kidney tubules;
Glandular tissue;
surface of ovary
what is the function of simple columnar
storage and secretion;
absorption
where is simple columnar located
villi small intestine; gallbladder
what is the function of stratified squamous
protection
where is stratified squamous located
epidermis (skin); cornea (eye)
what is the function of stratified cuboidal
storage and secretion
where is stratified cuboidal located
glandular tissue
what is the function of transitional
storage and secretion
where is transitional located
urinary bladder
what is the function of stratified columnar
; storage and secretion;
where is stratified columnar located
digestive tract; male urethra
what is the function of pseudo stratified columnar
contains cilia (filter) and goblet cells(secrete mucous to trap particles); also known as the mucous membrane;
where is pseudo stratified columnar located
trachea; respiratory tract
what is the function of desmosome
; allow for some exchange between cells;
where is desmosome located
stratified squamous epithelium; epidermis of skin
what is the function of tight junction
no exchange between cells;
where is tight junction located
transitional epithelium; urinary bladder
what is the function of gap junction
much exchange between cells
where is gap junction located
simple columnar epithelium; villi of small intestine (absorption).