The interatrial groove, separating the two atria, is scarcely marked on the posterior surface, while anteriorly it is hidden by the pulmonary artery and aorta.
This article incorporates text from a public domain edition of Gray's Anatomy.
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Anatomy of torso, cardiovascular system: heart (TA A12.1, TH H3.09.01, GA 5.524)
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| General |
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Surface
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base · apex · grooves (coronary/atrioventricular, interatrial, anterior interventricula, posterior interventricular) · surfaces (sternocostal, diaphragmatic) · borders (right, left) · Openings of smallest cardiac veins
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Internal
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atria (interatrial septum, musculi pectinati, sulcus terminalis) · ventricles (interventricular septum, trabeculae carneae, chordae tendineae, papillary muscle) · valves · cusps · Atrioventricular septum
cardiac skeleton
Intervenous tubercle
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| Chambers |
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Right heart
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(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 (conus arteriosus, moderator band/septomarginal trabecula) → pulmonary valve → (pulmonary artery and pulmonary circulation)
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Left heart
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(pulmonary veins) → left atrium (atrial appendage) → mitral valve → left ventricle → aortic valve (aortic sinus) → (aorta and systemic circulation)
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| Layers |
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Endocardium
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Heart valves
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Myocardium
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Conduction system: Cardiac pacemaker · SA node · AV node · bundle of His · Purkinje fibers
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Pericardial cavity
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Pericardial sinus
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Pericardium
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fibrous pericardium (Sternopericardiac ligaments) · serous pericardium (epicardium/visceral layer) · Fold of the left vena cava
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M: HRT
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anat/phys/devp
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noco/cong/tumr, sysi/epon, injr
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proc, drug (C1A/1B/1C/1D), blte
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