All of the organs in the respiratory system are responsible for inhaling clean oxygen and exhaling carbon dioxide. Oxygen and carbon dioxide are exchanged in the alveoli, which are the tiny sacs in the lungs. Your trachea, or wind-pipe is what filters the air coming in so that all of the bacteria doesn't get into our lungs. At the end of the trachea are the two branches called bronchi. The bronchi carry the oxygen into the lungs. At the bottom of our lungs is the diaphragm. The diaphragm is a dome-shaped muscle that controls breathing. When we breathe in, it flattens out and pulls forward in order to make room for our lungs. When we exhale, it expands and forces the air out. The average resting rate for adults is 12 to 20 breathes per minute. All of these organs work together in order to make sure we are taking in clean air and releasing the bad. They also help get oxygen to the rest of our body and without them we wouldn't be able to survive.