External respiration

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Last updated 5:49 PM on 4/9/26
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9 Terms

1
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What does respiration obtain?

O2 from the atmosphere to be used by the body cells (in tissues)

2
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What does respiration eliminate?

waste products such as CO2 produced by body cells to the atmosphere.

3
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What is the primary process that moves air into and out of the lungs?

Air

4
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Air is exchanged between _____ and ______ of the lungs.

atmosphere (external environment) & air sacs (alveoli)

5
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The mechanical act of breathing is also known as:

Ventilation

6
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Rate of ventilation is regulated to….

adjust the flow of air between the atmosphere and alveoli according to the body’s metabolic need for O2 or CO2

7
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O2 and CO2 are exchanged between the air in….

alveoli and blood in the pulmonary capillaries. (diffusion)

8
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The blood transports O2 and CO2 between….

lungs and the tissues

9
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O2 and CO2 are exchanged between the….

tissue cell and blood (diffusion across systemic (tissue) capillaries)