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| helps protect the living cell layers underneath from exposure to bacteria, heat and chemicals. |
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| a pigmint that colors the skin and helps protect body cells from damage by solar radiation. |
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| hair grows out of narrow cavities in the dermis |
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| includes the skull and the bones that support it |
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| bones of the arms and legs and structures associated with them, aka sholder, hip bones, wrists, ankles, fingers and toes. |
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| are found where two or more bones meet. |
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| tough band of connective tissue that attaches one bone to another. |
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| thick bands of connective tissue that attach miscles to bones |
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| surronding every bone layer is hard bone |
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| compact bone surronds less dence bone aka spongy bone |
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| production sight for red blood cells, white blood cells, and cell fragments involved in blood clotting. |
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| found in many other bones cosits of stored fat |
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| muscle lines organs, contracting to move materials through the body |
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| a muscle that contracts under conscious control |
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| muscle is attached to bones and contracts to produce body movements. |
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| each fiber is made up of smaller units |
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| the thicker filaments are made up this protine |
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| thinner filaments are made up of this protine |
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| the functional units of muscle. |
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| when signaled the actin filaments within each sarcomere slide toward one another shortening te sarcomeres in a fiber and causing the muscle to contract |
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