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The main function of this body system is to protect the body from the outside environment. It is also a defense of our body against pathogens. * A. Integumentary System B. skeletal system C. Digestive System D. Circulatory System​

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Answer:

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.

my answer is A

Explanation:

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