The respiratory system works with the circulatory system, by supplying oxygen in the lungs to the blood to be carried throughout the tissues in the body and taking carbon dioxide from the blood into...
the circulatory system works with the respiratory system ------------ The closest integrated system with the respiratory system is the cardiac system as stated above. Each system has it's own...
The respiratory system oxygenates the blood and expels carbon dioxide and the heart pumps the oxygenated blood out to the body and collects the de-oxygenated blood and carries it back to the lungs.