How do we breathe?

The second part of my expose is about the muscle of breathing. As we saw from the previews lecture that we have 2 groups of muscles involved in breathing: inspiratory and expiratory muscles. The primary muscle of inspiratory is the diaphragm. It has a arc shape and has 2 part called hemidiaphragm. Hemi means half. so we have right half and left half, commonly called right Hemidiaphragm and left hamidiaphragm. The create Inspiration just by positionning upward or downward. while breathing in the diaphragm moves upward making the stomach to boldge forward while the lungs are getting filled up with air. And once the peak is reached the cycle reverse and the diaphragm moves downward and it is expiration or exhalation.