ascending aorta in dogs

The ascending aorta is the portion of the aorta in a two-pass circulatory system that lies between the heart and the arch of aorta[GO]. A portion of the aorta commencing at the upper part of the base of the left ventricle, on a level with the lower border of the third costal cartilage behind the left half of the sternum; it passes obliquely upward, forward, and to the right, in the direction of the heart's axis, as high as the upper border 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. The total length is about 5 cm in length [Wikipedia]. Every claim on this page comes from the Leumas anatomy graph and carries its source.

What the ascending aorta is

The ascending aorta is the portion of the aorta in a two-pass circulatory system that lies between the heart and the arch of aorta[GO]. A portion of the aorta commencing at the upper part of the base of the left ventricle, on a level with the lower border of the third costal cartilage behind the left half of the sternum; it passes obliquely upward, forward, and to the right, in the direction of the heart's axis, as high as the upper border 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. The total length is about 5 cm in length [Wikipedia]. The atlas records it as a organ at the organ scale in the dog.

Where the ascending aorta is

It sits in the thorax and trunk, within the cardiovascular system. Positioned deliberately as part of this species body plan.

What the ascending aorta connects to

The atlas records 11 typed relationships for it, across 6 kinds of connection. part of thoracic aorta.

Supply and innervation

This dataset asserts no arterial supply, venous drainage or innervation for the ascending aorta. Only a minority of structures carry those edges here, so an empty answer means nothing has been recorded — not that there is nothing to record.

Also called

Also recorded as ascending thoracic aorta, pars ascendens aortae and aorta ascendens. Searching any of those names reaches this page.

Source

Uberon multi-species anatomy ontology (Mungall et al.), CC BY 4.0. Term UBERON:0001496, version 2026-06-19, retrieved 2026-08-24. Licence: CC-BY-4.0.

• Part of: thoracic aorta.
• A kind of: thoracic aorta.
• Connected to: arch of aorta, left coronary artery and right coronary artery.
• contributes to morphology of: thoracic aorta, bulb of aorta and sinotubular junction.
• contains: bulb of aorta and sinotubular junction.
• Develops from: outflow tract aortic component.

Questions

Where is the ascending aorta?

It sits in the thorax and trunk, within the cardiovascular system. Positioned deliberately as part of this species body plan.

What does the ascending aorta connect to?

Part of: thoracic aorta.

Is the ascending aorta the same in other species?

This page describes the dog. The human record of the same structure sits beside it on /compare, over one shared model rather than two atlases built separately.