The integumentary system is primarily made up of two main components: the skin and its associated structures.
1. The Skin: This is the largest organ of the body and serves as a protective barrier, regulating temperature, and preventing loss of moisture. The skin is divided into three layers: the epidermis (the outer layer), the dermis (the middle layer), and the hypodermis (the deeper layer). Each layer has its own specific functions, including sensation, absorption, and more.
2. Associated Structures: These include hair, nails, and various glands (such as sweat glands and sebaceous glands). Hair provides insulation and protection, nails protect the tips of fingers and toes, and glands play roles in thermoregulation and skin hydration.
Overall, these two components work together to protect the body from external threats, regulate essential functions, and maintain homeostasis.