The major function of the respiratory system is the exchange
of oxygen and carbon dioxide between the blood
and the atmosphere. In addition to this gas exchange, the
respiratory system also regulates blood pH. The organs of this system include the nose, pharynx,
larynx, trachea, bronchial tree, and the lungs. Each of these
structures has a role in ventilation (bringing air in and out
of the body) and external respiration (the gas exchange of
oxygen and carbon dioxide). Understanding this system is
important in assisting with patients and instructing them
in the use of an inhaler.
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