The diagram illustrates a garden pond containing a fountain that is operated by a pump. The fountain transfers oxygen from the air to the fish living in the pond. This system can be likened to part of the human circulatory system. The pump is likened to the heart. What do P and Q correspond to?
- AP: aorta, Q: pulmonary artery
- BP: pulmonary artery, Q: vena cava
- CP: pulmonary vein, Q: vena cava
- DP: vena cava, Q: aorta