The Balance of Skin

At first I was just studying about my subject, which is animal testing, but now I have new information. It is about the integumentary system which is the skin. The skin is the body’s largest organ and the top layer of skin is called the epidermis which is made up of epithelial cells. The epidermis does not contain blood vessels and its main jobs are protection, absorption of nutrients, and homeostasis. Homeostasis is the balance of things. For an example, the heart speeds up when we start doing more of a physical activity and when we stop doing that activity the heart slows down because we don’t need as much oxygen or blood pumped around our body. With skin it’s the same idea only a different way. Our skin sweats when we do physical activity and gets goose bumps if we get cold. It tries to keep things in balance throughout our daily lives. This is what I’ve learned so far about the skin.