Q: What functions does the integumentary system perform?  

Answer: A

The integumentary system performs a variety of important functions for the body. One of its main functions is regulating body temperature through the production of sweat and the dilation or constriction of blood vessels in the skin. Another important function is protecting the body from pathogens and harmful substances in the environment. The skin's outermost layer acts as a physical barrier, and specialized immune cells in the skin help to identify and destroy foreign invaders. Finally, the integumentary system also stores fat in the subcutaneous layer of the skin, which helps to insulate the body and provides a source of energy.

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