muscular system digestive system lymphatic system circulatory system
I gave my students this multiple choice question: The body is made up of many systems that interact with one another. For example, the skeletal system and the muscular system work together to help the body move. Which system works with the respiratory system to distribute oxygen to the body?

Only one answer is correct among these 4 choices:
- muscular system
- digestive system
- lymphatic system
- circulatory system

Could you tell me which one is correct?

circulatory system