Purpose Of Integumentary System

Purpose Of Integumentary System

The integumentary system comprises of the nails, hair and human skin, which is the largest organ in the body.  It has many functions, and its proper functioning is important for a healthy human body. One of its many functions is to waterproof the body. The outermost layer of the skin is dead and keratinized, and has twenty to thirty layers of cells.

The integumentary system also prevents water loss from the body and its cells. The skin protects the body against germs. Fungal growth is checked by acidic secretions from the glands present in the skin which is the primary defense station of the body. The skin also helps in excretion. The dermis layer of the skin has sweat glands which excrete water and toxins through pores present in the epidermis.

When the body temperature rises, the sweat glands will receive a signal from the hypothalamus to release more water. This secretion of excess water will cool the body. The blood vessels in the skin will also dilate and makes more blood to flow which will help the excess heat to get dissipated.    

The subcutaneous layer forms a cushion and protects the delicate organs situated just beneath the skin. The skin also keeps the body warm by insulating it with fat. The skin absorbs Vitamin D from the sun which helps in good growth of bones in the body. One of the most important functions of the skin is to act like a window to the outside world by bringing it closer to us through the sense of touch. 

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Purpose Of Integumentary System