Skin of man

Skin

The skin in man consists of two layer. 

1. Upper epidermis 

  It is the superficial layer of the epidermail cells

2. Dermis

            The deep layer of the skin is called Dermis. This layer contains a number of blood vessels and capillaries. It also consists of a large number of sweat and sebaceous glands ( oil glands )

           The fat is deposited beneath the skin. The uppermost layer of the lower epidermis is Malpighian layer. It contains melanin pigments which are reponsible for skin colour. The hair develops from the hair follicles

Functions of the skin

1. The skin protects the organs from mechanical injury and microbes.

2. It removes waste materials from the blood through sweat.

3. The secretion of the oil glands moistens the skin and the hair. 

4. It acts as sense organ.

5. It helps to maintain the body temperature. 

          In fire accidents, the skin is completely burnt. So there is no peotection for the internal organs. Due to this, people die of infection. Hence, skin is the first order of defence.