Median sacral artery unpaired Terminal branches: supply pelvis and lower limbs 10. Accessory renal arteries are often missed with ultrasound, this being one of the reasons why alternative imaging is required before planning aneurysm repair. Once the thoracic aorta passes through the aortic hiatus of the diaphragm on its downward journey, it becomes the abdominal aorta. Celiac Trunk The celiac trunk extends from the abdominal aorta just inferior to the diaphragm and divides into three branches. The inferior mesenteric artery a. The vessels of the superior phrenic arteries supply the posterior region of the superior surface of the diaphragm. The superior pancreaticoduodenal artery a.
It is followed by the right colic artery, which provides blood flow to the ascending colon. Blood flowing to the superior regions of the rectum is provided by the superior rectal artery, which supplies the rectum to the level of the internal anal sphincter. At the colon it divides into a descending branch, which anastomoses with the ileocolic, and an ascending branch, which anastomoses with the middle colic. The other supply sources of the head have already been treated in connection with the aortic arches and consist of the internal carotid artery for the anterior and lateral part of the brain and the external carotid artery for the face. The middle suprarenal arteries aa. A large laminar branch enters the lamina very close to the union of the lamina with the pedicle.
It later turns laterally and upward to divide in the region of the iliac fossa. It is the celiac trunk This is a perennial trick question in Anatomy class. The right gastric artery a. At this level, the aorta terminates by bifurcating into the right and left common iliac arteries that supply the lower body. The inferior phrenic arteries aa. It includes the abdominal esophagus , stomach, duodenum superior to the maj or papilla , liver, pancreas,and gallbladder.
They now cross the Quadratus lumborum, the upper three arteries running behind, the last usually in front of the muscle. One of these branches, the hepatic artery, further divides into three more branches to supply blood to the digestive organs. Branches of Abdominal Aorta: Ventral branches unpaired : supply gut 1. The venous anatomy of the region generally parallels that of the arterial anatomy, but it is more variable. We have these paired arteries that going to the viscera; see them here and here. Major arterial channels include: the obturator artery, a branch of the internal iliac artery; the medial circumflex femoral artery, a branch of the femoral artery; the lateral circumflex femoral artery, also a branch of the femoral artery; and the superior and inferior gluteal arteries, branches of the internal iliac artery. The next artery to stem from the aortic arch is the left common carotid artery which supplies the right side of head and neck, though it basically supplies different muscles and the left subclavian artery.
It goes up from the heart towards the head for a few inches the ascending aorta , the arch loops around the the rest of it goes down toward the feet the de … scending aorta. The ascending branch crosses in front of the left kidney and ends, between the two layers of the transverse mesocolon, by anastomosing with the middle colic artery; the descending branch anastomoses with the highest sigmoid artery. The Left Colic Artery a. As the aorta continues, there are three branches from the aortic arch. The right phrenic passes behind the inferior vena cava, and along the right side of the foramen which transmits that vein.
In addition to the above, the aorta also gives rise to paired inferior phrenic artery, unpaired median sacral artery, and two terminal branches. They are two slender vessels of considerable length, and arise from the front of the aorta a little below the renal arteries. Their branches supply the lower part of the descending colon, the iliac colon, and the sigmoid or pelvic colon; anastomosing above with the left colic, and below with the superior hemorrhoidal artery. The celiac trunk is an unpaired artery that subdivides into three branches:. It descends in the middle line in front of the fourth and fifth lumbar vertebræ, the sacrum and coccyx, and ends in the glomus coccygeum coccygeal gland. The abdominal aorta gives three sets of branches: 1. The aorta is the major blood vessel than leaves the heart.
After passing through the aortic hiatus, there are four unpaired branches and five paired branches from the abdominal aorta. The part of the descending aorta that is in the abdomen the mid section is the descending abdominal aorta. Previous to its division it gives off two or three small branches to the pyloric end of the stomach and to the pancreas. They pass lateralward and slightly upward, over the crura of the diaphragm, to the suprarenal glands, where they anastomose with suprarenal branches of the inferior phrenic and renal arteries. The abdominal aorta commences at the level of the diaphragm, where it enters through the aortic hiatus and lies just in front of the spine.
This bifurcation can be visualized on the anterior abdominal wall as a point approximately 2. Calcification in the walls of abdominal venous structures is rare. The abdominal aorta forms several branches, three of which supply blood to the intestines: the celiac trunk, superior mesenteric artery, and inferior mesenteric artery. The inferior gluteal artery passes posteriorly to pierce the sacral plexus more inferiorly most often between S2 and S3 and exits the pelvis through the inferior part of the greater sciatic foramen, inferior to the piriformis muscle. Finally, the iliolumbar veins drain into the common iliac veins rather than into the internal iliac veins. Marfan syndrome is the fibrilin-1 gene mutation, with annuloaortic ectasia.