The circulatory system consists of an entire network of blood cells that is being pumped in the entire body throughout and the respiratory system has the main function to exhale carbon dioxide and inhale oxygen for providing energy.
Both circulatory and respiratory systems work together for transportation of oxygen to all the organs and muscles of the body. The heart pumps the oxygen rich blood from lungs and excretes or disposes the waste in the blood to the lungs to breathe and exhale out of the body.