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3 Body Systems
Bones, Muscles, Skin
| Term | Definition |
|---|---|
| skeletal system | all the bones in the body; forms an internal living framework that provides shape and support, protects internal organs, moves bones, forms blood cells, and stores calcium and phosphorus compounds for later use |
| periosteum | tough, tight-fitting membrane that covers a bones' surface and contains blood vessels that transport nutrients into the bone |
| cartilage | thick, smooth, flexible tissue layer that covers the ends of bones, makes movement easier by reducing friction, and absorbs shock |
| joint | any place where two or more bones come together' can be movable or immovable |
| ligament | tough band of tissue that holds bones together at joints |
| muscle | an organ that can relax, contract, and provide the force to move your body parts |
| voluntary muscle | muscles that you can consciously control |
| involuntary muscle | muscles you can't control consciously |
| skeletal muscle | muscles that are attached to bones and cause movement when contracted; has striations under a microscope |
| tendon | thick bands of tissue that attach muscles to bone |
| cardiac muscle | involuntary muscle found only in the heart; has striations under a microscope |
| smooth muscle | involuntary, non-striated muscle found in intestines, bladder, blood vessels, and other internal organs |
| skin | protective layer of tissue also involved in sensory response, formation of vitamin D, regulation of body temperature, and ridding the body of wastes |
| epidermis | outer, thinnest layer of skin; outer layer is dead and water-repellant |
| melanin | pigment that protects your skin from UV rays in sunlight and gives it color |
| dermis | layer of skin directly under epidermis; thicker and has many blood vessels, nerves, muscles, and sweat and oil glands |
Created by:
MsHollinger
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