Question
What are the five main functions of simple epithelial tissues?
Solution
The main functions of simple epithelial tissues are:
(i) The cells form the outer layer of skin. They protect the underlying cells from drying, injury, infection and chemical effects.
(ii) They regulate the exchange of materials between the body and the external environment.
(iii) They help in absorption of water and other nutrients, especially in alimentary canal.
(iv) They help in the elimination of waste products.
(v) Some of them are greatly specialized (glandular cells) and perform secretory function.
