The Respiratory and Circulatory Systems
Amazing Body Series
The respiratory system controls breathing. Our body takes in oxygen and gives off carbon dioxide through the breathing process. Oxygen and carbon dioxide are exchanged in the lungs. Our lungs connect our respiratory system to our circulatory system. Every cell in our body needs oxygen and gives off waste. Our blood vessels and blood are the delivery system in our bodies. It takes stuff in and drops it off and it picks stuff up and takes it out! And boogers are actually an important part of the respiratory system.