Air that is entering the lungs has

Question

Quizplus · Accepted Answer

Air that is entering the lungs has a higher concentration of oxygen and a lower concentration of carbon dioxide than air in an alveolus because during inhalation, air from outside the body moves into the lungs, where it mixes with air remaining in the respiratory tract. This new air that enters the lungs has a higher concentration of oxygen than the air in the alveoli, while it has a lower concentration of carbon dioxide. During exhalation, the air in the alveoli is released, which has a higher concentration of carbon dioxide and a lower concentration of oxygen.

Air That Is Entering the Lungs Has