| A | B |
|---|
| Integumentary System | Organ system that traps moisture, protects from germs and disease, senses and feels the outside, regulates body temperature, and removes wastes |
| Melanin | A chemical in the skin that determines skin color. |
| Epidermis | Top, visible layer of the skin |
| dermis | lies underneath the top layer of skin, contains the majority of the skin's organs. |
| Blood vessels | tubes that carry blood to all parts of the body and help to regulate body temperature. |
| nerves | located in the epidermis and dermis, and carry messages to and from the brain |
| Sweat glands | Small organs located in the dermis. Produce a salty liquid that flows to the surface of the skin to keep the body cool and remove waste |
| Hair follicle | Located in the dermis, tube shaped, surrounds the part of the hair that is under the skin, location where the hair grows |
| Hair erector muscle | Located in the dermis, attaches to the hair follicle, causeses the hair to stand up when it contracts and tightens. |
| Oil gland | release oil that keeps hair flexible, and helps to keep theepidermis waterproof, form pimples when they become clogged with dirt. |
| Nail root | location where new nail growth occurs under the base and sides of the nail |
| Collagen | connective tissue located in the dermis that provides strenth and allows skin to bend without tearing |
| cancer | damage to the DNA in cells that results in uncontrolled cell reproduction, producing a mass of cells called a tumor. |
| Keratin | Protein found in dead skin, hair and nail cells that helps to keep the cells tough and strong. |
