epithelial tissue In which cells are bound tightly together structurally and functionally to form a ?
sheetlike or tubular structure
epithelial tissue is composed of polyedral cell and thin layer of extracellular material
The cell's size and morphology are generally dictated by their ?
function
region of the cell that faces the connective tissue or basal membrane
basal surface/pole
usually faces the surface of lumen
apical surface/pole
all epithelial tissue lie at the
basement membrane
all epithelial tissue are
avascular
Basement membrane act as filter and provide support for epithelial tissue
basement membrane is the structure near the epithelial cells
thin mesh work type IV collagen and laminin produced by the epithelial cells
basal lamina
contain type III collagen and anchoring fibrillation of VII collagen
reticular lamina
epithelial cells are connected to the lateral sides and the basement membrane by these junctional complexes
seals adjacent cells to one another, controlling passage of molecule between them and separates apical and basolateral membrane domains
occluding or tight junctions
provide points linking the cytoskeleton of adjacent cells; strengthen and stabilizes nearby ocular junction.
site of strong cell adhesion
adherent junction
provides point of strong intermediate filament coupling between adjacent cells, strengthening the tissue
resembles a belt around the cell
desmosome or macula adherens
anchoris cytoskeleton to the basal lamina
hemidesmosome
allows direct transfer of small molecules and ions from one cell to another.
this is more on the intracellular communication instead of cell to cell adhesion
gap or communicating junction
small membrane projections with cores of actin filaments that generally function to increase epithelial cells apical surface area for absorption
microvili
long microvili with specialized mechanosensory function; loger and less mobile than microvili and show branching distally
stereocilia
larger projecting structures with a well organized core of microtubule in which restricted, dyein based sliding of microtubule causes ciliary movement that propel material along an epithelial surface

cilia
motile cilia exhibit rapid beating pattern that move certain substances into our tissue
the one responsible for the pattern or movement is axoneme
axoneme is 9+2 assembly of microtubule = 11
flat; sheet like thin appearance cell
squamous
square/cuboid, equal width, height and depth
cuboidal
tall/rectangular, taller than they're wide
columnar
one layer
pseudostratified epithelial
made up of packed cells that appeared to be arranged in many layers because of different sizes and the orientation of their nucleus
simple epithelium
two or more layers
transitional epithelim/urothelium
cell constituting the tissue can change the shape depending on the dissension in the organ
stratified epithelium
for movement of substances
ciliated
serious lining of cavities such as pericardium, pleura, peritoneum for lubrication
meso for the term middle
mesothelium
made up of flat cells that lines the blood vessels
endo means within
endothelium
basket cells, to remodel the scars in the skin
myoepithelium
lining of uterus
endometrium
layer of the ovaries and seminiferous tubules
germinal epithelium
for secretions and also known as secretory epithelium