Biology · Human Respiratory System
What occurs during the process of external respiration in the lungs?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1Oxygen is produced within the alveoli
- 2Only O2 is transported, CO2 is not affected
- 3CO2 moves from alveoli into blood, O2 moves from blood into alveoli
- 4O2 moves from alveoli into blood, CO2 moves from blood into alveoli✓
Correct answer
O2 moves from alveoli into blood, CO2 moves from blood into alveoli
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