how does oxygen enter and carbon dioxide leave the bloodstream Flashcards
1
Q
oxygen
A
oxygen diffuses from the air in the alveoli (high o2 concentration) into the blood in the capillaries (low o2 concentration.
2
Q
carbon dioxide
A
carbon dioxide diffuses from the blood in the capillaries (high co2 concentration) into the air in the alveoli (low co2 concentration)