Aortic vestibule
Encyclopedia
The portion of the left ventricle
Left ventricle
The left ventricle is one of four chambers in the human heart. It receives oxygenated blood from the left atrium via the mitral valve, and pumps it into the aorta via the aortic valve.-Shape:...

 immediately inferior to the aortic orifice is termed the aortic vestibule, and possesses fibrous instead of muscular walls.
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