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3 Body Systems

Bones, Muscles, Skin

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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