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Respiration. Pulmonary ventilation (breathing): movement of air into and out of the lungsExternal respiration: O2 and CO2 exchange between the lungs and the bloodTransport: O2 and CO2 in the bloodInternal respiration: O2 and CO2 exchange between systemic blood vessels and tissues. . Respiratorys
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1. 22 The Respiratory System:
2. Respiration Pulmonary ventilation (breathing):movement of air into and outof the lungs External respiration: O2 and CO2exchange between the lungsand the blood Transport: O2 and CO2in the blood Internal respiration: O2 and CO2exchange between systemic bloodvessels and tissues