Question

Which are the different types of epithelial tissues present in animals?

Answer 1

Answer:

Simple epithelial tissues are generally classified by the shape of their cells. The four major classes of simple epithelium are:

1) simple squamous;

2) simple cuboidal;

3) simple columnar;

4) pseudostratified.

Answer 2

Answer:

There are several different types of epithelial tissues are present in animals depending upon the functions.

Explanation:

The epithelial tissues are classified according to the arrangement of the cells into layers. These cells are arranged in one or more layers depending on the functions, it may be-

• Simple epithelium- it is a single layer of cells.

• Stratified epithelium- it consists of two or more layers of the cells.

Then the simple epithelium is further divided according to the shapes of the cells. It may be-

• Squamous cells are arranged like floor tiles and thin.
• Cuboidal cells are tall as they are wide and are shaped like hexagons or cubes.
• Columnar cells are like columns, it means that they are much taller than they are wide, .
• Pseudostratified epithellium is a single layer of cells but appears to have multiple layers of cells because the cell nuclei lie at different levels.

The Simple, cuboidal, columnar, pseudostartified epithelium tissues are further divided into nonciliated and ciliated epithellium.

Stratified epithelium is further divided into-

• Squamous, cuboidal, columnar and transitional stratified epithelium.
• The squamous epithelium tissues  will be further divided into keratinized and non keratinized squamous epithelial cells.