Question

Write three functions of epithelial tissues.

Answer 1

Epithelial Tissue

1. All layers and organs in the body are lined by a group of tissues called epithelial tissues which are commonly referred to as epithelium.
2. They cover the surface of all internal as well as external organs.
3. Epithelial tissue is highly permeable.
4. Thus, it plays a significant role in the exchange of substances across the cells and helps in maintaining the osmoregulation.
5. Depending on the number of layers of cells it is composed of the epithelium.
6. The epithelium has been divided into the simple epithelium and compound epithelium.
7. The main functions of epithelial tissue are protection, secretion, absorption, and sensation.

Functions of Epithelial tissues are:

1. The cells of the body surface which form the outer layer of skin are epithelial cells. These cells protect the underlying cells from drying, injury, and chemical effects.
2. Inside the body, epithelial cells form lining of mouth and alimentary canal and protect these organs.
3. Epithelial tissues help in absorption of water and nutrients in small intestine.
4. Some epithelial tissues perform secretory function such as sweat, saliva in skin and mouth cavity.