In the course of expiration, the diaphragm passively relaxes and returns to its first dome shape. This decreases the volume of 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.Personal injury for the phrenic nerve can noticeably impair diaphragmatic movement, result