Monday, February 18, 2019

Relations of the Ascending Aorta :: essays research papers fc

The ascend aorta, or aorta ascendens, along with its constituents, amounts to about five centimeters in length. It constitutes the initial fragment of the aorta, the largest artery in the body. It originates from the upper portion of the go away ventricle of the rawness at the aortic valve on a level with the lower coast of the deuce-ace costal cartilage butt joint the left half of the breastbone it passes obliquely upward, forward, and to the practiced, in the direction of the hearts axis, as racy as the upper fudge of the second right costal cartilage, describing a slight curve in its course, and being situated, about 6 cm. behind the posterior surface of the sternum. (Gray 1) It then gives rise to the right and left coronary thrombosis arteries, which supply the heart muscle. It then curves left continuing into the repellent of the aorta. Originating from the aorta be the right brachiocephalic trunk, left common carotid, and left subclavian arteries. The coronary ar teries, therefrom being, the only branches of the ascending aorta.At the entrance of the ascending aorta are tercet minute aortic sinuses and the Aortic Semilunar Valve, a three-cusped valve located at the base of the ascending aorta behind the sternum at the level of the third intercostal space (Grine 273). The point at which the ascending aorta converges with the aortic arch is termed the bulb of the aorta, a swelling due to vessel increasement on the right wall. Lying superior to the ascending aorta is the trunk of the pulmonary artery and the auricular appendage of the right atrium. It is partitioned from the sternum by the serous pericardium, the right pleura, the preceding margin of the right lung, some loose areolar tissue, and the remains of the thymus. Posteriorly, it is propped upon the left atrium and right pulmonary artery. Lying adjacent on the right border is the superior vena cava and right atrium.

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