Respiratory system

By. jessica lee

Overall functions

The primary function of the respiratory system is to supply the blood with oxygen in order for the blood to deliver oxygen to all parts of the body. This occurs while we are breathing. When we breathe, we inhale oxygen and exhale carbon dioxide. This exchange of gases is the respiratory system's means of getting oxygen to the blood.

organ and individual roles

Lungs, trachea, bronchi, and diaphragm make up the respiratory system. In the lungs, oxygen is taken into the body and carbon dioxide is breathed out. The red blood cells pick up the oxygen inside the lungs and carries them to all the body cells that needs it. As the blood cells drop off oxygen, it then picks up the carbon dioxide which is a waste gas product produced by our cells. The red blood cells transport the carbon dioxide back to the lungs and we breathe it out when we exhale. Trachea is sometimes called the windpipe. It filters the air we breathe and branches into the bronchi. Bronchi are two air tubes that branch off of the trachea and carry the air directly into the lungs. Diaphragm is the dome-shaped muscle used for breathing which is located at the bottom of the lungs. When it contracts as we breathe in, it flattens out and pulls downward which enlarges the space that the lungs are in. This larger space pulls air into the lungs. When you breathe out, the diaphragm expands reducing the amount of space for the lungs and forcing air out.


Respiratory and muscular systems work together by moving air in and out of the lungs.