2. Integumentarysystem The integumentary sytsem also provides vitanim D The integumentary system (integument, a covering) consists of the skin (cutis) and its appendages The protective covering for the body known as the skin is one of the largest organs of the body and accounts for approximately 16% of the body weight. .
5. EPIDERMIS Its main function is protection, absorption of nutrients, and homeostasis. In structure, it consists of a keratinized stratified squamous epitheliumcomprising four types of cells: keratinocytes, melanocytes, Merkel cells, and Langerhans' cells
6. DERMIS The dermis is the middle layer of skin, composed of dense irregular connective tissues such as collagen with elastin arranged in a diffusely bundled and woven pattern
7. HYPODERMIS Although technically not part of the integumentary system, the hypodermis, or subcutaneous tissue, is the layer of tissue directly underneath the dermis. It is composed mainly of connective and adipose tissue.
8. NAILS A nail is a horn-like envelope covering the dorsal aspect of the terminal phalanges of fingers and toes in humans, most non-human primates, and a few other mammals.
9. HAIR The human body, apart from its glabrous skin, is covered in follicles which produce thick terminal and fine vellus hair. Most common interest in hair is focused on hair growth, hair types and hair care, but hair is also an important biomaterial primarily composed of protein, notably keratin.
11. ATHLETE FOOT Is a fungal infection of the skin that causes scaling, flaking, and itch of affected areas. It is caused by fungi in the genusTrichophyton and is typically transmitted in moist areas where people walk barefoot, such as showers or bathhouses..
12. SUNBURN Usual mild symptoms in humans and other animals include red or reddish skin that is hot to the touch, general fatigue, and mild dizziness
