Restate: If one of the systems, either respiratory or circulatory, is not working, it will affect the other because they depend on each other.Answer: The respiratory system is in charge of bringing oxygen into the body and removing carbon dioxide, while the circulatory system carries that oxygen through the blood to the whole body. If the respiratory system stops working, the circulatory system will not have oxygen to deliver. On the other hand, if the circulatory system fails, even if the lungs get oxygen, it cannot reach the cells.Cite evidence: For example, when a person stops breathing, the heart may still be pumping, but without oxygen from the lungs, the blood just circulates without giving life to the body. Also, when the heart stops beating, oxygen from the lungs cannot travel to the organs, which leads to damage and eventually death.Explain: This shows that both systems must work together because one cannot function well without the other. They are like partners—the lungs provide the air, and the heart and blood deliver it everywhere.If either the lungs or the heart does not work, the whole chain is broken.Here’s a labeled diagram showing how the respiratory and circulatory systems work together to deliver oxygen to the body cells[tex].[/tex]