| Q: | A blood cell is tagged in the right ventricle of the heart. Which of the following structures would be expected to see this tagged blood cell first? |
| A | right atrium | |
| B | left atrium | |
| C | pulmonary artery | |
| D | pulmonary vein |
The correct answer is C. You should be able to eliminate answer choice D right away, since veins bring blood back to the heart. If the cell were tagged in the heart, it would be pumped away, through an artery. You should also be able to eliminate the right atrium and left atrium, since the atriums are where blood enters the hearth from the veins. Remember this diagram of the heart:
It goes: vena cava –> right atrium –> right ventricle –> pulmonary artery to lungs –> pulmonary vein from lungs –> left atrium –> left ventricle –> aorta.