Well, the two layers of skin are very important because they help protect and preserve your insides of your body. The top layer of your skin, your Epidermis, is important because it contains melanin to keep your skin from burning (sunburn) and also protects it from harmful UV and sun radiation. It also has a protective layer that acts as a barrier to keep water or other fluids, bacteria, and other foreign objects out of your body. The second layer of your skin, your Dermis is the thickest layer of skin that protects you in a few different ways. It contains sweat glands that automatically excrete sweat when your body gets warm. It is a way for your body to naturally cool itself down and regulate its temperature. This layer of skin also contains sensory nerves that send signals to the brain whenever someone touches your arm or when you get hurt. Without those nerves, if you had an injury or burn that is deeper than the first layer of skin, you may not be able to feel it.
