What does the integumentary system primarily include?

The integumentary system primarily includes skin, hair, nails, and accessory organs because it serves as a protective barrier for the body, helps regulate temperature, and plays a vital role in the synthesis of vitamin D. The skin is the largest organ, comprising multiple layers that contribute to its protective functions. Hair and nails are appendages of the skin that contribute to its overall structure and function. Accessory organs, like sweat and sebaceous glands, are also crucial for maintaining the health of the skin and regulating bodily functions. Understanding this system's components emphasizes the importance of proper care and hygiene in maintaining skin health and protecting against environmental factors.