What does aorta mean?
The aorta is the largest artery in the human body and the central trunk of the systemic circulatory system. Arising directly from the left ventricle of the heart, it receives freshly oxygenated blood and distributes it through an extensive network of branching vessels to virtually every organ and tissue. Roughly the diameter of a garden hose, it arches over the heart before descending through the chest and abdomen. The word carries a distinctly clinical register: it surfaces most commonly in medical contexts, from anatomy lessons to discussions of serious conditions such as aortic aneurysm or coarctation. Derived from the Greek for the great artery itself, the term has remained remarkably stable across centuries of anatomical writing. Understanding what the aorta is and does provides a useful anchor point for grasping how the cardiovascular system as a whole functions.
nounThe main and largest artery of the human body, which carries oxygenated blood from the left ventricle of the heart to all parts of the body except the lungs.
- The principal artery of the body, arising from the left ventricle of the heart and distributing oxygenated blood through its branching arteries to the systemic circulation.
"The surgeon clamped the aorta to control the bleeding during the operation."
"Blood leaves the heart through the aorta at very high pressure."
"An aneurysm in the abdominal aorta can be life-threatening if it ruptures."
The anglicised plural 'aortas' is standard when referring to multiple subjects, while the Latinate 'aortae' survives mainly in formal or specialist anatomical writing.
"The study compared the elasticity of the aortas of young and elderly patients."
The aorta is roughly the width of a garden hose — about 2–3 centimetres across — making it the widest blood vessel in your entire body.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of aorta
The word 'aorta' comes via Latin from the Greek 'ἀορτή' (aortē), meaning the great artery, a term traditionally attributed to Aristotle. It was adopted into English in the early modern period, appearing in anatomical texts by the late sixteenth century. Its Greek origin connects it to other anatomical vocabulary that entered English through Latin and Greek scientific writing.
Related word forms
How aorta is actually used
A technical term used chiefly in medical, anatomical, and scientific contexts. In everyday speech it appears most often in discussions of health conditions such as aneurysms. The plural 'aortae' is rare; 'aortas' is more common when discussing multiple individuals.
Easily confused with aorta
An artery is any blood vessel carrying blood away from the heart, whereas the aorta is the single largest artery, originating from the left ventricle.