BI-1083
Alveoli and gas exchange
Biology · Secondary 3 · Medium · Alveoli and gas exchange
Which feature of the alveoli most directly allows rapid diffusion of oxygen into the blood?
- Alveolar walls are one cell thick.
- Alveoli contain many cartilage rings.
- Alveoli have thick muscular walls.
- Alveoli are filled with tissue fluid instead of air.
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