The integumentary system includes many different areas of the body, including hair, skin, and nails. The integument also performs many functions such as protection and insulation. The largest part of the integumentary system is the skin that covers the entire body. The first part of the integumentary system is the epidermis and dermis. The epidermis is the outer layer of the skin and serves as the main protection for the skin and nerves underneath. The epidermis is full of tiny cells called keratin, which are dead cells that also help protect. The epidermis also contains melanocytes which contain cells called melanin that give the skin its color and absorb sunlight. The second layer of the skin is the dermis. This is the thickest layer just beneath the epidermis. This layer contains collagen and elastin fibers to keep it firm and elastic and give it strength and flexibility. This layer also contains the arteries, veins, hair follicles, and sweat glands of our body. It is very important to keep both layers of the skin protected and hydrated, since in any body system there are many diseases and foreign bodies that can affect the health of our body. this organ. It is important to stay hydrated and, if you are exposed to direct sunlight for long periods of time, apply sunscreen. Various infections and lesions can occur on the skin, some of which include burns, abrasions, ulcers, abscesses, and tinea. All these infections and lesions affect the dermis and must be treated on an individual case basis. An abscess would be classified as containing pus caused by bacteria and requires antibiotic medication. Tinea is a skin infection caused by fungi that feed on epidermal cells. It should be treated immediately......middle of paper......and itching and can be treated with topical creams. Examples include: chemicals in cleansers or lotions applied to the skin. Systemic reactions occur when the allergen is inhaled, injected or ingested. This can have serious effects on the person by causing more than one body system to react. Depending on the level of allergy, the person may experience anaphylaxis, a severe allergic reaction that can be life-threatening. Examples include: eating a food you are allergic to or a bee sting. The integumentary system is an important body system with many different areas that should be cared for on a daily basis. Just like any internal organ, you want this organ to function to the best of its ability. Hair, skin and nails provide a lot of protection and insulation and without them working at their best we would be subject to many diseases and infections that float through everyday life.