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NCI Dictionary of Cancer Terms

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NCI Dictionary of Cancer Terms



respiratory system  listen  (RES-pih-ruh-TOR-ee SIS-tem)

  The organs that are involved in breathing. These include the nose, throat, larynx, trachea, bronchi, and lungs. Also called respiratory tract.

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Respiratory anatomy; drawing shows right lung with upper, middle, and lower lobes; left lung with upper and lower lobes; and the trachea, bronchi, lymph nodes, and diaphragm. Inset shows bronchioles, alveoli, artery, and vein.