SKIN

                         SKIN

INTEGUMENTARY SYSTEM :

It comprises of skin and its appendages( including hair,scales, feathers, and nails). It is the organ system that protects the body from damage. 

Skin is a soft outer covering of an animal. Skin is largest organ of the body. It contitutes about 16% of body weight.

FUNCTIONS OF SKIN : 

Skin performs the following functions:

1. Skin performs the regulation of body temperature.

2. Skin performs sensation.

3. Skin performs protection.

4. Skin performs excretion.

5. Skin performs immunity

6. Skin performs Aesthetic appeal and communication.

7. Skin performs as storage organ

8. Skin performs synthesis of Vitamin D

9. Skin performs as physical barrier.

10. Skin performs absorption.

11. Skin performs as water resistance.

12. Skin controls of evaporation.

13. Skin performs as Blood reservoir.

SKIN'S COMPONENTS AND STRUCTURES

Within 1 sq. Inch of skin, varying from 1 mm to 4 mm thickness, there are 650 sweat glands, 65 hair folicles, 19 yards ofcapillaries, 78 yards of nerves, thousands of sensory cells, nerve endings and Langerhans cells, melanocytes.

SKIN ANATOMY

Skin has 3 layers:

1. Epidermis

2. Dermis

3. Hypodermis or Subcutaneous