TED-Ed What are the universal human rights?

The video explores the skin, the body's largest organ, covering its structure, functions, and roles. Skin is part of the integumentary system, consisting of three layers: epidermis, dermis, and hypodermis. It serves as a protective barrier, regulates temperature, and provides sensory input. The epidermis is constantly renewed, while the dermis contains collagen for shock absorption. Skin hosts microorganisms that aid immune defense. It regulates temperature through blood vessels and sweat glands, and hair follicles help conserve heat. Overall, skin is a complex, multifunctional organ.

Explain how the skin acts as a barrier to protect the body.

What is the function of Langerhans cells in the skin?