What does the integumentary system protect body from?

* Mechanical injury: The skin is a tough, flexible barrier that protects the body from cuts, bruises, and other physical trauma.

* Infection: The skin contains a number of natural antimicrobial substances, such as sweat and sebum, that help to keep bacteria and other microbes from entering the body.

* Dehydration: The skin helps to prevent the body from losing water, which is essential for maintaining homeostasis.

* Heat loss: The skin helps to regulate body temperature by trapping heat in the body and releasing it when necessary.

* Ultraviolet radiation: The skin contains melanin, a pigment that helps to protect the body from the harmful effects of ultraviolet radiation.

* Chemicals: The skin helps to protect the body from exposure to harmful chemicals.

* Allergens: The skin helps to protect the body from allergens, which are substances that can cause an allergic reaction.