Do ?ó môi ch?t b? tác ??ng và d?ch chuy?n t?o thành dòng ch?y liên t?c qua bu?ng b?m. Thay ??i t?c ?? c?a màng b?m s? ?i?u ch?nh ???c l?u l??ng c?a b?m ?i?n t?.During expiration, the diaphragm passively relaxes and returns to its original dome form. This reduces the amount on the thoracic cavity.The diaphragm is located at the base on the t