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Aorta

Aorta

The largest artery in the body, the aorta carries oxygenated blood from the left ventricle and distributes it to all tissues through its branches. Elastic recoil of its walls, the Windkessel effect, helps maintain blood pressure between heartbeats. It begins at the aortic root emerging from the left ventricle: the ascending aorta gives off the coronary arteries, the arch supplies the brachiocephalic, left common carotid, and left subclavian arteries, and the descending aorta passes through the thorax and abdomen before bifurcating into the common iliac arteries at the level of L4. Clinically, an aortic aneurysm may rupture and cause fatal hemorrhage, while aortic dissection is a life-threatening tear within the wall. Atherosclerosis frequently involves the aorta, and coarctation is a congenital narrowing of the vessel.

Begins at the aortic root emerging from the left ventricle. The ascending aorta gives off coronary arteries, the aortic arch gives off brachiocephalic, left common carotid, and left subclavian arteries. The descending aorta passes through the thorax and abdomen, bifurcating into common iliac arteries at L4.

On this page
类型 Vessel
身体系统 Cardiovascular
身体区域 Heart Region
拉丁名称 Aorta
FMA ID 3734

功能

The largest artery in the body, carrying oxygenated blood from the left ventricle to distribute to all body tissues via its branches. Maintains blood pressure through elastic recoil of its walls (Windkessel effect).

临床意义

Aortic aneurysm (dilation) can rupture, causing fatal hemorrhage. Aortic dissection is a life-threatening tear in the aortic wall. Atherosclerosis commonly affects the aorta. Coarctation of the aorta is a congenital narrowing.

Frequently Asked Questions

What is the function of the aorta?

The aorta is the largest artery in the body and carries oxygenated blood from the left ventricle of the heart to the rest of the body. It distributes blood to every organ system through major branches including the coronary arteries, carotid arteries, subclavian arteries, celiac trunk, renal arteries, and iliac arteries.

Where is the aorta located?

The aorta originates at the aortic valve of the left ventricle in the chest. It arches upward (ascending aorta), curves over the heart (aortic arch), descends through the thorax (descending thoracic aorta), and continues into the abdomen (abdominal aorta) before bifurcating into the common iliac arteries at approximately the level of the fourth lumbar vertebra.

What is an aortic aneurysm?

An aortic aneurysm is a localized dilation or bulge in the wall of the aorta, most commonly occurring in the abdominal segment. Aneurysms develop when the aortic wall weakens, often due to atherosclerosis, hypertension, or connective tissue disorders. Rupture is a life-threatening emergency requiring immediate surgical or endovascular intervention.

References

  1. Foundational Model of Anatomy — FMA:3734 Reference anatomy ontology (University of Washington)
  2. UBERON — UBERON:0000947 Cross-species anatomy ontology (EMBL-EBI Ontology Lookup Service)
  3. Wikidata — Q101004 Structured knowledge base cross-reference
  4. Wikipedia — Aorta Encyclopedia article (verified cross-reference)

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Educational Disclaimer

This content is for educational and informational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider for medical decisions.

Data sources: Terminologia Anatomica, Foundational Model of Anatomy, Wikidata.