AP BIOLOGY

Detailed explanation-1: -Your skin has three main layers, and the epidermis (ep-uh-derm-us) is the outermost layer in your body. The other two layers of skin are the dermis and hypodermis. The epidermis is the thinnest layer of skin, but it’s responsible for protecting you from the outside world, and it’s composed of five layers of its own.

Detailed explanation-2: -Your skin protects your body from germs and regulates body temperature. Nerves in the skin help you feel sensations like hot and cold. Your skin, along with your hair, nails, oil glands and sweat glands, is part of the integumentary (in-TEG-you-ME I NT-a-ree) system. “Integumentary” means a body’s outer covering.

Detailed explanation-3: -It protects the body from external factors such as bacteria, chemicals, and temperature. The skin contains secretions that can kill bacteria and the pigment melanin provides a chemical pigment defense against ultraviolet light that can damage skin cells.

Detailed explanation-4: -Melanin helps protect the cells of the epidermis, or outer layer of the skin, from UV light.