Respiratory and circulatory work together to transport gases, nutrients and molecules throughout the different organs in our body. respiratory refers to a system that is responsible for breathing and circulatory is a system that is responsible for distributing materials throughout the body.
this would be the process show:
at first when you inhale, the fresh air or oxygen enters through the nose and then to the passage way of air the trachea, through the 2 branching tube called the bronchial tube and then through the subdivided small tubes within the lungs called the bronchioles and after the air pass through this tube, then to the small millions air alsacs or alveoli this is the site where the exchanging of gases occur, soon after the gas goes to the left portion of your heart which is responsible to pumped to the bloodstream, the fresh air or oxgen combine called the oxygenated blood, soon after the oxygenated blood goes through the arteries, a blood vessel that carry oxygenated blood throughout the tissue and different organs of the body, as it distribute to the organs, the oxygen process the nutrients to release energy. during this process they given off oxygen as their waste product called the carbon dioxide. the blood become deoxygenated due to the combination carbon dioxide, as the deoxygenated blood passing through the veins to carry deoxygenated blood to the heart. as it carry to the heart the heart pump the blood, the waste material goes to lungs and this actually the time you release or exhale the carbon dioxide.