Your skin covers your body and protects it from the environment. Your skin is composed of three major layers, the epidermis, dermis, and subcutaneous tissue. The epidermis is the outermost layer of your skin. It protects your inner skin layers.
The dermis is your second layer of skin. It is made up of connective tissue and provides structure. The dermis contains hair cells, sweat glands, and sebaceous glands that secrete oils to hydrate the skin.
Subcutaneous tissue composes your inner most layer of skin. Subcutaneous tissue contains fat cells. The fat cells insulate your body and make your skin appear plump and full. Below the subcutaneous tissue are fat tissues, your muscles, and your bones.