(a) Briefly explain the types of epithelial tissues.
(b) What is basement membrane?
(a) Briefly explain the types of epithelial tissues.
(b) What is basement membrane?
A)There are three types of epithelial cells, which differ in their shape and function.
Squamous- thin and flat cells
Cuboidal- short cylindrical cells, which appear hexagonal in cross-section
Columnar- long or column-like cylindrical cells, which have nucleus present at the base
On the basis of the number of layers present, epithelial tissue is divided into the simple epithelium and stratified or compound epithelium
Simple Epithelium- it is composed of one layer of a cell and mostly has a secretory or an absorptive function
Compound (Stratified) Epithelium- it is made up of two or more than two layers of cells and mostly has a protective function
The glandular epithelium is made up of cuboidal or columnar cells. They are specialised for secretion.
b)Basement membrane is responsible for separating all epithelial tissues from the underlying tissue. It is an extracellular fibrous membrane
Squamous- thin and flat cells
Cuboidal- short cylindrical cells, which appear hexagonal in cross-section
Columnar- long or column-like cylindrical cells, which have nucleus present at the base
On the basis of the number of layers present, epithelial tissue is divided into the simple epithelium and stratified or compound epithelium
Simple Epithelium- it is composed of one layer of a cell and mostly has a secretory or an absorptive function
Compound (Stratified) Epithelium- it is made up of two or more than two layers of cells and mostly has a protective function
The glandular epithelium is made up of cuboidal or columnar cells. They are specialised for secretion.
b)Basement membrane is responsible for separating all epithelial tissues from the underlying tissue. It is an extracellular fibrous membrane
