Final answer:
The integumentary system comprises the skin, nails, and glands. It provides protection, senses the environment, and helps maintain homeostasis in the body.
Step-by-step explanation:
The integumentary system is composed of the skin, nails, and glands. It serves several functions, including providing a protective covering for the body, sensing the environment, and helping the body maintain homeostasis. The skin, as the largest organ, acts as a barrier against harmful microorganisms and toxins.