17. The following statements concerning the diaphragm are true except:
Опрос
- a) All the muscle of the diaphragm is supplied by the phrenic nerves
- b) On contraction, the diaphragm increases the intrathoracic pressure
- c) The right crus provides a sphincterlike mechanism for the esophagus
- d)On contractiondiaphragm assists in return of venous blood toright atrium of lymph to thoracic duct
- e) When viewed from the front, the central tendon of the diaphragm lies behind xiphisternal joint