carrying blood from the body to the heart supplying nutrients from the intestines to the body carrying carbon dioxide from the body to the lungs passing waste materials from the blood to outside the body
I gave my students this multiple choice question: Noah studied different systems in the human body. Which best describes a function of veins in the circulatory system?

Only one answer is correct among these 4 choices:
- carrying blood from the body to the heart
- supplying nutrients from the intestines to the body
- carrying carbon dioxide from the body to the lungs
- passing waste materials from the blood to outside the body

Could you tell me which one is correct?

carrying blood from the body to the heart