The descending aorta is divided into two sections that are named for their location.

降主动脉分为两个部分，以其位置命名。

Lastly, G is for great vessels which includes the superior vena cava, inferior vena cava, ascending aorta, aortic arch, pulmonary artery, and descending aorta.

最后，G指大血管" Great vessels" ，包括了上腔静脉、下腔静脉、升主动脉、主动脉弓、肺动脉与降主动脉。

In this lesson, you will learn about the descending aorta, which begins at the aortic arch and is divided into two sections, the thoracic and the abdominal aorta.

本节课，我们将学习降主动脉，它从主动脉弓开始，分为两部分，胸主动脉和腹主动脉。

After exiting the heart, the aorta makes a U-turn at the aortic arch and becomes known as the descending aorta as it plunges down through the thorax and abdomen.

主动脉离开心脏后，在主动脉弓处作一个U形转弯，当穿过胸腔和腹部时，被称为降主动脉。

The main thing to note about the descending aorta is that it has a number of branches coming off of it, much like back roads would come off of a highway.

关于降主动脉，需要注意的主要问题是它有许多分支从降主动脉上分支，就像小道从高速公路上分支一样。