Lungs and kidneys Heart and lungs Brain and kidneys Heart and liver
I gave my students this multiple choice question: In your body, what two organs work together to make sure that oxygen gets to all the other organs of your body?

Only one answer is correct among these 4 choices:
- Lungs and kidneys
- Heart and lungs
- Brain and kidneys
- Heart and liver

Could you tell me which one is correct?

Heart and lungs