"The convex dome of diaphragm on right side is higher because of large size of the right lobe of liver" Level of diaphragm:Site of diaphragmatic herniaRight dome: Upper border of 5th rib (about 2.5 cm higher than left side)Left dome: Lower border of 5th ribCentral tendon: Xiphisternal jointThe pleuroperitoneal canal is (more on the left side; caused by failure of fusion of the septum transversum with the pleuroperitoneal membrane), the opening between the xiphoid and costal origin of the diaphragm. 98% of diaphragmatic hernias are esophageal hiatus hernia. Also know:When seen from the side, diaphragm has the appearance of an inveed J shape.Diaphragm derives its motor supply from phrenic nerve.