Aortic orifice

Anatomical feature of the human heart

Aortic orifice
Details
Identifiers
Latin	ostium aortae
TA98	A12.1.04.010
TA2	3994
FMA	9350
Anatomical terminology [edit on Wikidata]

The aortic orifice (aortic opening) is a circular opening, in front and to the right of the left atrioventricular orifice, from which it is separated by the anterior cusp of the bicuspid valve.

The portion of the ventricle immediately below the aortic orifice is termed the aortic vestibule, and has fibrous instead of muscular walls.

References

Public domain This article incorporates text in the public domain from page 534 of the 20th edition of Gray's Anatomy (1918)

Anatomy of the heart

General

Surface	base apex sulci coronary interatrial anterior interventricular posterior interventricular borders right left
Internal	atria interatrial septum pectinate muscles terminal sulcus ventricles interventricular septum trabeculae carneae chordae tendineae papillary muscle valves cusps atrioventricular septum cardiac skeleton intervenous tubercle

Chambers

Right heart	(venae cavae, coronary sinus) → right atrium (atrial appendage, fossa ovalis, limbus of fossa ovalis, crista terminalis, valve of inferior vena cava, valve of coronary sinus) → tricuspid valve → right ventricle (infundibulum, moderator band/septomarginal trabecula, crista supraventricularis), → pulmonary valve → (pulmonary artery and pulmonary circulation)
Left heart	(pulmonary veins) → left atrium (atrial appendage) → mitral valve → left ventricle → aortic valve (aortic sinus) → (aorta and systemic circulation)

Layers

Endocardium	heart valves
Myocardium	Conduction system cardiac pacemaker SA node Bachmann's bundle AV node bundle of His bundle branches Purkinje fibers
Pericardial cavity	pericardial sinus
Pericardium	fibrous pericardium sternopericardial ligaments serous pericardium epicardium/visceral layer fold of left vena cava