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28 Cards in this Set
- Front
- Back
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epidermis |
outer, thinnest skin layer, that constantly produces new cells to replace the dead cells that are rubbed off its surface. |
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dermis |
skin layer below the epidermis that contains blood vessels, nerves, oil, and sweat glands, and other structure |
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melanin |
pigment produced by the epidermis that protects skin and gives skin and eyes their color |
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voluntary muscle |
muscle, such as a leg or arm muscle, that can be consciously controlled |
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involuntary muscle |
muscle, such as heart muscle, that cannot be consciously controlled |
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periosteum |
tough, tight-fitting membrane, that covers a bone's surface and contains blood vessels that transport nutrients into the bone |
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cartilage |
thick, smooth, flexible and slippery layer that covers the ends of bones, makes movement easier by reducing friction, and absorbing shocks |
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joint |
any place where two or more bones come together; can be movable or immovable |
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ligament |
tough band of tissue that holds bones together at joints |
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neuron |
basic functioning unit of the nervous system, made up of a cell body, dendrites, and axons |
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synapse |
small space across, which an impulse moves from an axon to the dendrites or cell body of another neuron |
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central nervous system |
division of the nervous system, made up of the brain and spinal cord |
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peripheral nervous system |
division of the nervous system; includes of all the nerves outside the Central Nervous System; connects the brain and spinal cord to other body parts |
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Largest organ in your body |
skin |
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Number of layers of tissue in sin |
Three |
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The most important function of skin |
Protection |
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What happens when skin is damaged |
Epidermis produces new cells and the dermis repairs tears |
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What muscles do to move bones and body parts |
Contract |
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Muscles that move bones. The muscle tissue appears striped, or striated, and is attached to the bone |
Skeletal muscles |
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Striated, involuntary muscles that is found in the heart |
Cardiac muscle |
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Smooth Muscle |
Found in many of your internal organs, such as the digestive track. The muscle tissue is nonstriated. |
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What happens when one muscle of a pair contracts |
The other muscle relaxes |
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Includes all the bones in your body and is your body's framework |
Skeletal system |
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Type of bone that is hard and strong |
Compact bone |
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Type of bone that has many open spaces to make it lightweight |
spongy bone |
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The nervous system responds to stimuli in order to maintain this |
homeostasis |
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Autonomic System |
Controls involuntary actions like heart rate and breathing |
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Somatic System |
Controls voluntary actions |
