In what order does a molecule of oxygen travel from the air into the blood of a person? 1 bronchiole 2 capillary 3 alveolus wall 4 larynx
- A$1 \rightarrow 4 \rightarrow 2 \rightarrow 3$
- B$3 \rightarrow 2 \rightarrow 1 \rightarrow 4$
- C$4 \rightarrow 1 \rightarrow 3 \rightarrow 2$
- D$4 \rightarrow 2 \rightarrow 1 \rightarrow 3$