Exhalation takes place in the event the diaphragm relaxes, returning to its dome condition and pushing air out on the lungs. This rhythmic contraction and relaxation are essential for maintaining standard respiratory and ensuring adequate oxygen source to the body.Khi s? d?ng b?m màng, b?n c?n chú ý m?t s? ?i?m quan tr?ng ?? ??m b?o Hello?u su?t