Posterior longitudinal sulcus
Encyclopedia
The ventricles
Ventricle (heart)
In the heart, a ventricle is one of two large chambers that collect and expel blood received from an atrium towards the peripheral beds within the body and lungs. The Atria primes the Pump...

 are separated by two grooves, one of which, the anterior longitudinal sulcus
Anterior longitudinal sulcus
The ventricles of the heart are separated by two grooves, one of which, the anterior longitudinal sulcus , is situated on the sternocostal surface of the heart, close to its left margin. The other groove separating the ventricles is the posterior interventricular sulcus....

, is situated on the sternocostal surface of the heart
Heart
The heart is a myogenic muscular organ found in all animals with a circulatory system , that is responsible for pumping blood throughout the blood vessels by repeated, rhythmic contractions...

, close to its left margin. The other is known as the posterior longitudinal sulcus (posterior interventricular sulcus, inferior interventricular groove), and is on the diaphragmatic surface near the right margin.

In it runs the posterior interventricular artery and middle cardiac vein
Middle cardiac vein
The middle cardiac vein commences at the apex of the heart, ascends in the posterior longitudinal sulcus, and ends in the coronary sinus near its right extremity.-External links: - "Posterior view of the heart."...

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