The organs involved in the interchange of gases between an organism and the atmosphere. In humans, this system consists of the air passageways and organs (nasal cavities, pharynx, larynx, trachea, and lungs, including bronchi, bronchioles, alveolar ducts, and alveoli) and the respiratory muscles.
Figure: RESPIRATORY SYSTEM
(A) anterior view, (B) alveoli and pulmonary capillaries
See: lung
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