How do the respiratory system and circulatory system work together in order to provide oxygen in body cells?
The respiratory system is basically your lungs. When you breathe in the air goes into your lungs and oxygen diffuses from the alveoli in your lungs into the blood. The blood then goes to the heart when the oxygen rich blood is pumped to the cells in your body. The blood eventually uses up the oxygen then returns to the lungs where the carbon dioxide and water vapour produced diffuse back into the lungs and are then breathed out.
