Which of the following statements are true of external respiration and internal respiration? (Read carefully and select all of the correct statements.) A)The P in PO₂ means presence of oxygen. B)In the alveoli, PCO₂ is low and PO₂ is high. C)In the tissues, PO₂ is high and PCO₂ is low. D)Internal respiration takes place in the pulmonary capillaries. E)External respiration takes place in the nasal cavities as the air is warmed F)The pressure gradient of a gas is much the same as a concentration gradient.

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The Answer of Which of the following statements are true of external respiration and internal respiration? (Read carefully and select all of the correct statements.) A)The P in PO₂ means presence of oxygen. B)In the alveoli, PCO₂ is low and PO₂ is high. C)In the tissues, PO₂ is high and PCO₂ is low. D)Internal respiration takes place in the pulmonary capillaries. E)External respiration takes place in the nasal cavities as the air is warmed F)The pressure gradient of a gas is much the same as a concentration gradient.

Which of the Following Statements Are True of External Respiration