name all the 4 tissues with there specific function?
- ET = covering, lining, diffusion, secretion and absorption
- CT = support and linkage
- MT = locomotion and movement
- NT= control and coordination
epithilial tissue rest upon which tissue?
connective tissue
characteristics of ET?
- cells are compactly packed with little intercellular matrix
- AVASCULAR
- high regeneration
- it has nerve supply
if ET is AVASCULAR, then how does it gets nutrition and blood supplies?
the Oxygen and nutrient from the blood in CT diffuses to epithilium via basement membrane
the basement membrane is made of?
glycoprotein + mucopolysaccharide + protein fibres
is basement membra cellular or non cellular?
non cellular
basment memb is secreted by?
it is secreted by both ET and CT.
the free surface of ET either faces the_____ or the ____
ext environ. or the body fluid
ET is orgined from?
it has origin from all the 3 layers
- ectoderm
- meso
3.endo
epithilium of skin has origin from?
ectodermal
epithilum of gut has origin from?
endodermal
free surface can modify itself into how many types? also define them
- MICROVILLI = finger like projection that are the folds of plasma membrane of epithilial cells, increases the surface area for secretion and absorption
- CILIA = hair like projection that helps in movement of substances along one directional
simple epithelium is classified on the basis of_______ modification
structural
characteristics of simple squamous epithelium
- cells are FLAT
- Nucleus is flat, and located in centre
- cells are irregular in boundaries.
- they also k/a pavement epi
