Before reaching the hilus of the kidney, each artery divides into four or five branches; the greater number of these lie between the renal vein and ureter, the vein being in front, the ureter behind, but one or more branches are usually situated behind the ureter. From it, minute branches are said to pass to the posterior surface of the rectum. Drawing on whiteboard the branches of the ambdominal aorta. Before reaching the hilus of the kidney, each artery divides into four or five branches; the greater number of these lie between the renal vein and ureter, the vein being in front, the ureter behind, but one or more branches are usually situated behind the ureter. As it lies upon the bodies of the vertebræ, the curve which it describes is convex forward, the summit of the convexity corresponding to the third lumbar vertebra. Left Gastric Artery Smallest Branch It enters upward and to the left to get to the cardiac end of the where it turns forwards to run downward along the lesser curvature of the stomach.
The part of the descending aorta that is in the abdomen the mid section is the descending abdominal aorta. Several of the branches of the abdominal have their own significant branches. It is also known as the celiac trunk and supplies the liver, stomach, abdominal oesophagus, spleen, the superior duodenum and the superior pancreas. The referred to as pancreatic branches are large and continuous, viz. These arteries supply the right side of the head and neck, and the right upper limb. They pass deep to the crura on side of vertebral bodies and pass deep to the psoas major and quadratus lumborum to enter the space between the internal oblique and transversus abdominis muscles. Abdominal Aorta The abdominal aorta is a continuation of the thoracic aorta beginning at the level of the T12 vertebrae.
Small branches are given to the ureter and the uterine tube, and one passes on to the side of the uterus, and unites with the uterine artery. It then runs from left to right, along the lesser curvature of the stomach to the pylorus, between the layers of the lesser omentum; it gives branches to both surfaces of the stomach and anastomoses with the right gastric artery. The right gastric artery a. It runs downward behind the duodenum and ends at its lower border by splitting into right gastroepiploic and superior pancreatic duodenal arteries. The short gastric arteries aa.
It is first directed forward and to the right, to the upper margin of the superior part of the duodenum, forming the lower boundary of the epiploic foramen foramen of Winslow. Continuing from the aortic arch, it initially begins to the left of the vertebral column but approaches the midline as it descends. That spli … ts into the right subclavian and right common carotid arery. These are basically the very small branches and its function to deliver the blood to the rectum. The aorta can be divided into four sections: the ascending aorta, the aortic arch, the thoracic descending aorta and the abdominal aorta.
A Pair of Common iliac arteries Celiac Artery and Its Branches: - supplies all derivatives of foregut lying in the abdomen - arises from the ventral part of abdominal aorta at the level of T12-L1 Branches: 1. One or two accessory renal arteries are frequently found, more especially on the left side they usually arise from the aorta, and may come off above or below the main artery, the former being the more common position. Dividing in the cervical region at the fourth cervical vertebrae, the left common carotid artery forms the external and internal carotid arteries of the left side. It passes horizontally to the left side, behind the stomach and the omental bursa of the peritoneum, and along the upper border of the pancreas, accompanied by the lienal vein, which lies below it; it crosses in front of the upper part of the left kidney, and, on arriving near the spleen, divides into branches, some of which enter the hilus of that organ between the two layers of the phrenicolienal ligament to be distributed to the tissues of the spleen; some are given to the pancreas, while others pass to the greater curvature of the stomach between the layers of the gastrolienal ligament. The left common iliac artery is shorter 4 cm than the right common iliac artery 5 cm. Muscular branches are supplied from each lumbar artery and from its posterior ramus to the neighboring muscles. They diverge from one another across the crura of the diaphragm, and then run obliquely upward and lateralward upon its under surface.
Each vessel gives off superior suprarenal branches to the suprarenal gland of its own side. Descending aorta-the section from the arch of aorta to the point where it divides into the comm … on iliac arteries. A fifth pair, small in size, is occasionally present: they arise from the middle sacral artery. It is smaller than the superior mesenteric, and arises from the aorta, about 3 or 4 cm. 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.
Except at the pylorus where it is in contact with the stomach, it lies about a finger's breadth from the greater curvature. Large anterior branch, arises just below celiac trunk. The abdominal aorta can also be compressed at this site by a backward pressure on the anterior abdominal wall. It is smaller than the superior mesenteric, and arises from the aorta, about 3 or 4 cm. Posteriorly, it is separated from the lumbar vertebræ and intervertebral fibrocartilages by the anterior longitudinal ligament and left lumbar veins.
The Left Colic Artery a. The vessels were injected while the gut was in situ; the gut was then removed, and an x-ray photograph taken. Small aortic aneurysms do not usually pose a serious immediate threat. Here it distributes branches to the esophagus, which anastomose with the aortic esophageal arteries; others supply the cardiac part of the stomach, anastomosing with branches of the lienal artery. It runs parallel to the , which is located just to the right of the abdominal aorta, and becomes smaller in diameter as it gives off branches. The collateral circulation would be carried on by the anastomoses between the internal mammary and the inferior epigastric; by the free communication between the superior and inferior mesenterics, if the ligature were placed between these vessels; or by the anastomosis between the inferior mesenteric and the internal pudendal, when as is more common the point of ligature is below the origin of the inferior mesenteric; and possibly by the anastomoses of the lumbar arteries with the branches of the hypogastric.
Lord Lister, having accurately examined 30 bodies in order to ascertain the exact point of termination of this vessel, found it either absolutely, or almost absolutely, mesial in 15, while in 13 it deviated more or less to the left, and in 2 was slightly to the right. The arteries of the right side pass behind the inferior vena cava, and the upper two on each side run behind the corresponding crus of the diaphragm. They are usually from twelve to fifteen in number, and are distributed to the jejunum and ileum. Here it splits into 5 or more segmental branches, which goes into the spleen to supply it. Once the left subclavian artery reaches the lateral border of the first rib it is referred to as the axillary artery. It then crosses the portal vein anteriorly and ascends between the layers of the lesser omentum, and in front of the epiploic foramen, to the porta hepatis, where it divides into two branches, right and left, which supply the corresponding lobes of the liver, accompanying the ramifications of the portal vein and hepatic ducts. Middle suprarenal artery: The posterior middle suprarenal artery that actually have two small segments middle capsular arteries and suprarenal arteries.
Left gastric-supplying the stomach and inferior portion of esophogus. In its course it distributes several ascending branches to both surfaces of the stomach; others descend to supply the greater omentum and anastomose with branches of the middle colic. It supplies rise to left and right hepatic arteries at the porta hepatis. Previous to its division it gives off two or three small branches to the pyloric end of the stomach and to the pancreas. The celiac artery is covered by the lesser omentum. It divides, opposite the third sacral vertebra, into two branches, which descend one on either side of the rectum, and about 10 or 12 cm.