What does the integumentary system do?

Answer 1

The integumentary system, made up of the skin, hair, nails, sweat glands, and oil glands, provides a protective covering for the interior of the body. It helps prevent pathogens from entering our body. The integumentary system prevents dehydration, and it helps synthesize vitamin D. It provides waterproofing for the body, and controls body temperature. It provides a way for us to recognize each other, as well. The skin acts like a breathable, waterproof barrier wall. Hair, such as eyelashes and nose hair, still provides protection and prevention of particles coming into our body.
It protects the body from various kinds of damage, such as loss of water or abrasion from outside. Skin and hair and nails provide that help in humans. In other creatures different coverings, such as scales, do the same job.