Interatrial sulcus

Interatrial sulcus
Anatomical terminology [edit on Wikidata]

The interatrial sulcus, separating the two atria, is scarcely marked on the posterior surface, while anteriorly it is hidden by the pulmonary artery and aorta.

References

This article incorporates text in the public domain from page 527 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