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| The basic unit of structure and function of living things. |
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| Too small to be seen without using a microscope. |
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| Any living thing that maintains vital life processes. |
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| The thin covering that surrounds every cell. |
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| The part of the cell that directs all of the cell's activities. |
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| The jellylike material inside a cell between the cell membrane and nucleus. |
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| A single-celled organism with a nucleus and organelles |
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| A group of cells that work together to preform a certain function. |
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| A group of organs that work together to do a job for the body. |
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| The organ system that turns food into nutrients that body cells need for energy, growth, and repair. |
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| The organ system made up of the heart blood vessels and blood that transports materials throughout the body. |
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| The organ system including the lungs that exchanges oxygen, and carbon dioxide between the body and the environment. |
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| The organ system, including the bones that protects the body and gives it structure. |
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| A group of organs that include the muscles and allows the body to move. |
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| The organ system including the brain spinal cord, and nerves that sense your surroundings and control other organs. |
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| The organ system including the kidneys and bladder, that removes waste materials from the body |
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