The Respiratory System

The diagram above shows our respiratory system organs. When we inhale the air from outside goes into the trachea and through its branches into the lungs. In the lungs these branches. At the end of the last branches, there are air sacs or alveoli.

Between the thoracic cavity and the abdominal cavity, there is an organ like a flexible sheet. It is called the diaphragm.

The diaphragm and its movement

When the diaphragm moves downward, we breathe in and the incoming air fills the alveoli in the lungs.

When the diaphragm moves upward, the air in the lungs is pushed out.

Exchange of gases

When the outside air reaches the alveoli, the oxygen is it passes into the thin blood vessels around the alveoli. with the blood, it is carried to all parts of the body.   At the same time, the carbon dioxide that is brought by the blood from all parts of the body enters the air in the alveoli. When we exhale, the carbon dioxide is also given out with the air.

In this way, an exchange of oxygen and carbon dioxide gases takes place in the alveoli.