integumentary system
Consists of the skin, glands, hair, and nails
The integumentary system is the external covering of our body, which includes the skin, hair, and nails. It plays a vital role in protecting the internal organs from the external environment, regulating body temperature, and maintaining proper hydration levels.
The skin is composed of three main layers – the epidermis, dermis, and subcutaneous layer. The epidermis is the outermost layer and is primarily composed of dead skin cells and a protein called keratin. The dermis is the middle layer and contains blood vessels, nerves, and hair follicles. The subcutaneous layer is the deepest layer and contains adipose tissue for insulation and cushioning.
Hair and nails are also important components of the integumentary system. Hair helps to regulate body temperature, protect the skin from UV radiation, and serves as a sensory organ. Nails are composed of keratin and function to protect the fingertips and allow for delicate movements.
Overall, the integumentary system plays a critical role in maintaining homeostasis and protecting the body from external injury and infection. Regular care of the skin, hair, and nails is essential to maintaining a healthy integumentary system.
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