Skin provides 4 functions. namely
1 defense
2. Responding to feelings
3. Take body heat
4. Excretion of unnecessary substances from the body.
1) Defense: The skin covers the body from all sides. The oil secreted by the sebaceous glands in the skin keeps the skin smooth and prevents water from entering the skin. Most fluids cannot penetrate the skin. Depletion of the skin's oil content leads to scaly skin and increased susceptibility to bacterial.
2) Sensational response: Sensations of temperature, touch, pressure, pain and displacement are sensed through cutaneous nerve endings. When this nerve in the skin is damaged, a person cannot feel heat, cold or pain. In this condition the body can be easily injured.
3) Body heat regulation: Thousands of capillaries in the skin help regulate body temperature. As the body temperature rises, the capillaries of the skin swell. It increases blood circulation to the skin and excess heat is dissipated. As a result, the skin becomes red and the skin feels hot. Capillaries constrict when body temperature drops. Blood circulation to the skin decreases and body temperature stabilizes. The skin color is slightly pale and feels cool.
4) Excretion of unnecessary substances from the body: Sweat removes the unnecessary substances from the body.
helps to come This sweat contains water, salt and some other substances.
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