The skin is the body's largest organ. It protects internal organs from injury and bacteria, controls the loss of water and other fluids, and regulates body temperature. The skin also helps the body get rid of excess water and salts, and allows you to feel pain, temperature, and touch.
Melanocytes produce the protective pigment called melanin .
Melanin gives the tan or brown color to our skin and helps protect the deeper layers of the skin from the sun. Dermis , which contains connective tissue, blood vessels, lymph vessels, hair follicles , and sebaceous and sweat glands, held together by a protein called collagen . Collagen, which is made by skin cells called fibroblasts , gives the skin its resilience and strength. Subcutis , the deepest layer of the skin. Together with the lowest part of the dermis , the subcutis forms a network of collagen and fat cells.