Question

Differentiate between pseudostratified and stratified epithelium.

Answer 1

Hint:Epithelial tissue is basically the outer covering of the skin and it also lines the body cavity. Pseudostratified and stratified epithelium are two types of epithelium.

Complete answer:
Before we find differences between pseudostratified and stratified epithelium, let us first look into what epithelia is.
Epithelium is the outer layering of skin and body cavity. It is present as a lining in digestive, respiratory, excretory and reproductive tracts. There are different types of epithelial tissues,
>Compound epithelium - It is made up of two or more than two layers
>Squamous epithelium - It is thin and flat cells
>Cuboidal epithelium - It is made up of cylindrical cells
>Columnar epithelium - It is made up of column like cells with nucleus at the center

In this question, we will be dealing with the key differences between the pseudostratified and stratified epithelium. Using a table lets list the key differences between them,

Pseudostratified epithelium	Stratified epithelium
It consists of long cells that extend up to the free surface and short cells that do not reach the outer free surface.	It is composed of multiple layers of cells that rest on a basement membrane.
It usually occurs as pseudostratified columnar epithelium.	It usually occurs as stratified squamous epithelium.
Its function is mostly absorption and filtration processes.	Its function is mostly protective.
It is found in male urethra and salivary glands	It is found in Respiratory passage

Note: The function of epithelial tissues are,
->It helps in exchange of substances between the body and the outer environment.
->Sensory receptors are present in the epithelial tissues which help in transmitting signals from nose, eyes, ears, taste buds to the brain It helps in protection as it is the first line of defence.