There are two basic parts to your skin. The surface called the epidermis which is the part that gets rubbed off when you skin a knuckle or a knee. The next layer below called the dermis is where most of the blood vessels reside. In order to bleed, a cut must be deep enough to reach the dermis.
Also, there are two kinds of glands in your skin. Sweat glands, (about 2,000,000) though which you perspire in order to get rid of liquid waste matter and to cool you off as the sweat evaporates on the skin. Oil glands waterproof your skin, preventing it from becoming too dry. They also keep your hair smooth and glossy.
Amazing isn’t it?
20/20 VISION — SEEING YOUR POSSIBILITIES!