Through expiration, the diaphragm passively relaxes and returns to its primary dome condition. This lessens the amount with the thoracic cavity.Các v? trí bi và ?? bi s? gi? ch?t l?ng trong bu?ng b?m và ch? cho phép ch?t l?ng ???c ?i ra theo one h??ng.The phrenic nerve provides the motor fibers that Handle the contraction and relaxation with t… Read More