Respuesta :
Answer:
The Respiratory system brings oxygen into the body and adds it to the blood, so the circulatory system can deliver it to all the cells of the body :3
Explanation:
:3
Answer:
Respiratory??
Explanation:
Your cardiovascular system works to circulate your blood while your respiratory system introduces oxygen into your body. But i don't see any options for circulatory so its most likely Respiratory.