What are six principal functions of integumentary system?
The integumentary system is the organ system that helps to maintain the body form and protects the body from damage like abrasions.
The important functions include :
1) Protection of internal tissues and organs from infectious agents, dehydration and abrupt changes in temperature.
2) It has multiple roles in maintaining homeostasis. All body systems work in an interconnected manner to maintain the internal conditions essential to the function of the body.
3) It helps to excrete waste materials through perspiration.
4) It acts as a receptor for touch, pressure, pain, heat and cold.
5) It generates Vitamin D through exposure to UV light.
6) It stores water, fat, glucose, and Vitamin D.
Apart from these it also serves to waterproof and cushion internal organs, protects the body against sunburn by secreting melanin. It helps to regulate body temperature and formation of new cells from stratum germanium to repair minor injuries.
The integumentary system comprises of the skin and appendages - including hair, nails, scales, feather, hooves and nails.