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| res·pi·ra·to·ry sys·tem (plural res·pi·ra·to·ry sys·tems) |
noun |
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| Definition: |
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air-breathing system: the system of organs in the body responsible for the intake of oxygen and the expiration of carbon dioxide. In mammals it consists of the lungs, bronchi, bronchioles, trachea, diaphragm, and nerve supply.
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