I BELIEVE THE CORRECT ANSWER IS THE PHRENIC .
The vessels that supply blood to the diaphragm are the superior phrenic artery, the inferior phrenic artery, and the musculophrenic artery.
Phrenic arteries
From Wiki:The pericardiacophrenic artery is a long slender branch, that accompanies the phrenic nerve, between the pleura and pericardium, to the diaphragm, to which it is distributed; it anastomoses with the musculophrenic and inferior phrenic arteries.
Branches from Pericardiacophrenic and some from musculophrenic arteries.
There are actually more than one portion of the aorta that is in the abdominopelvic cavity. The left ventricle and thoracic aorta of the heart lead to the abdominal aorta which begins at the diaphragm. The abdominal aorta first branches into the inferior phrenic and celiac arteries, superior mesenteric and middle suprarenal arteries, renal and gonadal arteries, lumbar artery, inferior mesenteric artery, and the median sacral and common iliac arteries. From there, the artery splits to form the two common iliac arteries that carry blood to the legs.
The celiac trunk, the superior mesenteric artery, and the inferior mesenteric artery are the main ones. I guess you could also say the renal arteries are major ones too. The minor ones are the inferior phrenic, middle suprarenal, gonadal, lumbar, and median sacral. Last is the common iliac, which goes to the leg.
Phrenic
phrenic nerve
veins
2 the superior and inferior
While reading " Structure and Function of the Human Body" I believe the correct answer is the phrenic nerve. Hope this helps. the nerve that stimulates is the phrenic nerve but it arises from the cervical plexus