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The integumentary system, primarily comprised of the skin, hair, nails, and associated glands, serves as the body's first line of defense against environmental threats. It regulates temperature, provides sensory information, and plays a crucial role in the production of vitamin D. The skin itself has multiple layers, including the epidermis, dermis, and hypodermis, each with unique functions. Understanding the components and functions of the integumentary system is essential for recognizing its importance in overall health and disease prevention.
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