The lungs, trachea bronchi and diaphragm, help people to breathe, which humans need to deliver oxygen and take out or get rid of carbon dioxide and the wasting of gas that is produced by the bodies cells.
It is the circulatory system it is very useful. This system transports the food nutrients, and oxygen to the body cells. It also delivers of carbon dioxide and waste products. This helps the respiratory system by transporting nutrients to keep the lungs clean, and healthy.
It helps the respiratory system to function well and kick in.