- It is a large sensory organ to touch.
- Protect underlined tissue and organs.
- Regulation of Temperature.
- Excretion of salt and water.
- 1st line defense mechanism against infection.
- Receive stimuli from external environment such as pain, touch, pressure, temperature, cold, and relay that information to CNS.
- Synthesis of vit D which is absorbed form sunlight necessary for calcium metabolism.
- Stores nutrient.
- Protect body from dehydration.