Cổng enter/ output: Là cổng cấp môi chất và cổng cho luồng môi chất đi ra khỏi bơmDuring expiration, the diaphragm passively relaxes and returns to its primary dome condition. This minimizes the amount on the thoracic cavity.The diaphragm also influences blood circulation by aiding the return of venous blood to the guts throug