How does the respetory and cerclutory system work toegether?

The respiratory and circulatory systems work together to deliver oxygen to the body's tissues and remove carbon dioxide. The respiratory system brings in oxygen from the air into the lungs, where it diffuses into the blood. The circulatory system, comprising the heart and blood vessels, then transports this oxygen-rich blood to cells throughout the body. Simultaneously, carbon dioxide produced by cellular metabolism is carried back to the lungs via the circulatory system to be exhaled.