Cell Biology Terminology-5th

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Organism

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a living thing that can function independently

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Cell

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the smallest unit of life that can live on its own and is the basic building block of all living things

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Multicellular

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made up of more than one cell

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Tissue

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a group of of similar cells that work together to perform a function

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Organ

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a structure made up of a group of tissues that work together to perform a specific function

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Organ System

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a group of organs and body parts that work together to perform a specific function for an organism

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Specialized

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design for a particular purpose or function

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Respiration

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exchange of oxygen and carbon dioxide; in humans it can be called 'breathing'

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Excretion

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removal of carbon dioxide, excess water and other waste products

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Sensitivity

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the ability of an organism to respond or react to a stimulus