The left ventricle pumps blood through the aortic semilunar valve into the aorta. From the aorta, blood enters into systemic circulation throughout the body tissues until it returns to the heart via the vena cava and the cycle repeats.he left ventricle pumps blood through the aortic semilunar valve into the aorta. From the aorta, blood enters into systemic circulation throughout the body tissues until it returns to the heart via the vena cava and the cycle repeats.
The signs and symptoms of superior mesenteric artery syndrome vary but may include: 1  Feeling full quickly when eating. 2  Bloating after meals. 3  Burping (belching)  Nausea and vomiting of partially digested food or bile-like 1  liquid. Small bowel obstruction.  Weight loss.
(Figure 5-22). The superior mesenteric artery and itsbranches supply blood to the pancreas, small intes-tine, and colon. The inferior mesenteric artery andits branches supply blood to the descending colonand rectum. Paired branches of the visceral abdomi-nal aorta supply blood to the kidneys, adrenal gland,and gonads.