Why is it important to know terms related to the integumentary system

The integumentary system consists of the skin, hair, nails, glands, and nerves. Its main function is to act as a barrier to protect the body from the outside world. It also functions to retain body fluids, protect against disease, eliminate waste products, and regulate body temperature.

answer; /// i believe that the correct answer is (c); ///when the lungs expand, they fill with air from the atmosphere;

answer; the above is true;