producing red blood cells. transporting oxygen to organs. providing nutrients to muscles. controlling the movement of the lungs.
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: In the human body, the circulatory system works with the respiratory system by
Possibilities:
- producing red blood cells.
- transporting oxygen to organs.
- providing nutrients to muscles.
- controlling the movement of the lungs.

transporting oxygen to organs.