The skin Protects the body and guards it from harmful intruders like viruses and bacteria. The skin is made up of three layers LAYER ONE--Epidermis The epidermis contains 5 layers- 1)stratum basale 2) stratum spinosum 3)stratum granulosum 4)stratum licidum 5)stratum corneum The epidermis is the outer layer of skin
LAYER TWO--DERMIS The dermis contains nerve endings, blood vessels, oil glands, and sweat glands. The dermis is home to the oil glands, too. The dermis is composed of three types of tissue that are present throughout - not in layers. The types of tissue are: collagen elastic tissue reticular fibers
LAYER THREE- SUBCUTANEOUS * The subcutaneous is made mostly of fat and helps your body stay warm and absorb shock *The subcutaneous layer also helps hold your skin to all the tissues underneath it. *The subcutaneous is where you'll find the start of hair
A hair follicle is a part of the skin that grows hair by packing old cellstogether. *The average person has 5 million hairs of which 100,000 - 150,000 are on the head
SKIN It is an organ for sensation: *Touch *Pain *Pressure Your skin can also help if you're feeling too hot or too cold.
SKIN COLOR~PIGMENT MELANIN Skin color is due to melanin, a pigment produced in the epidermis to protect us from the sun's potentially cancer-causing ultraviolet rays Dark-skinned people have more melanin than light- skinned people Melanin is also found in hair Freckles, which occur in people of all races, are small, concentrated areas of increased melanin production Melanin also gives color to the iris of the eye