Vessel
Aorta
The main arterial route from the left ventricle to the body
High-yield
Ascending aorta, arch, descending thoracic aorta and abdominal aorta describe successive regions of one continuous vessel.
Overview
The aorta distributes left ventricular output to the systemic arteries. After its root and ascending segment, it curves through the arch and descends through the chest and abdomen. Elastic tissue in its wall helps buffer the pulsatile output of the heart.
Reference facts
- Origin
- The left ventricular outlet through the aortic valve
- Course
- Upward from the heart, around the arch, then down through the thorax and abdomen; diaphragm passage is near T12 and iliac division near L4
- Branches
- Coronary, arch, thoracic and abdominal branches distribute blood to successive territories
- Supplies
- The systemic arterial circulation through its branches
- Drains to
- Continues into systemic arteries; it does not drain into a vein
Clinical correlation
Aneurysm is abnormal enlargement; dissection involves separation within the aortic wall. These are different processes, although they can coexist and both may have serious complications.
Frequently asked questions
Where does the aorta originate?
The left ventricular outlet through the aortic valve.
What does the aorta supply?
The systemic arterial circulation through its branches.
Where does the aorta drain to?
Continues into systemic arteries; it does not drain into a vein.
What are the branches of the aorta?
Branches of the aorta include the coronary, arch, thoracic and abdominal branches distribute blood to successive territories.