Question

Given below is a diagrammatic sketch of the vertical section of the human skin.
(b) State one main function of each of the following parts - Part 2, Part 3, Part 4, Part 9.
Name any one of the above parts which has at least three functions.

Answer 1

1. Part 2 is Sebaceous gland

• Its main function is to produce sebum to help keep the skin moist.

2. Part 3 is Sweat gland

• Function of the sweat gland is to secrete sweat - a transparent liquid that is composed of water, salts.

3. Part 4 is Fat

• The skin stores food in the form of a fat layer in fat cells called adipocytes.

4. Part 9 is Hair

• Hair provides insulation to the body.

• From the above parts, the one which has at least three functions is - Sebaceous gland:
• Protects skin∙
• Produces sebum that lubricates the hair and skin of mammals.
• Sebum also protects from bacterial and fungal infections.