What is human body covered with?

The human body is almost entirely covered in a layer of skin and hair for protection and warmth. Together, the skin and hair form the body’s largest sensory organ, with an array of sensors that give the brain detailed data about the body’s surroundings. The body has different skin and hair types, depending on where they are and their role.

Basically, the skin is comprised of two layers that cover a third fatty layer. These three layers differ in function, thickness, and strength. The outer layer is called the epidermis; it is a tough protective layer that contains the melanin-producing melanocytes. The second layer (located under the epidermis) is called the dermis; it contains nerve endings, sweat glands, oil glands, and hair follicles. Under these two skin layers is a fatty layer of subcutaneous tissue, known as the subcutis or hypodermis. 

Head hair helps protect the scalp from sun exposure. It also helps insulate the body. It traps air so heat can’t escape from the head. Hair in eyelashes and eyebrows helps keep water and dust out of the eyes. Hairs inside the nostrils of the nose trap dust and germs in the air so they can’t reach the lungs.

 

Picture Credit : Google