Aorta. The walls of the arteries

The aorta is divided into three sections: the ascending aorta, aortic arch and descending aorta, which, in turn, is divided into thoracic and abdominal parts.

left edge of the sternum at the level of the third intercostal space; in the initial section, it has the extension - a bulb of the aorta (25-30 mm in diameter). The location on the inner side of the aortic valve arrangement has three aortic sinus. Each of them is located between the respective
semilunar valve and the aortic wall. From
the beginning of the ascending aorta
depart right and left coronary arteries.
Ascending aorta lies behind and somewhat
to the right of the pulmonary trunk, goes up and
at the level of the compound 2 right costal
cartilage with the sternum goes into the aortic
arch (where its diameter is reduced to
21-22 mm).

The top of its site is located in front of and to the left of the esophagus. Then, at 8-9 thoracic vertebrae aorta bends around the esophagus to the left and go to the back surface. To the right of the thoracic aorta are located unpaired Vienna and thoracic duct, left to it adjoins the parietal pleura, in place of its transition into the rear of the left mediastinal pleura. In the thoracic cavity thoracic aorta gives parietal branch pair; posterior intercostal arteries and visceral branches to the posterior mediastinum organs.