THORAX ABDOMEN AND PELVIS

Detailed explanation-1: -The coronary sulcus, also known as the atrioventricular groove, is a groove that separates the atria and ventricles of the heart. It extends from the upper medial end of the third left costal cartilage to the middle of the right sixth chondrosternal joint.

Detailed explanation-2: -The coronary sulcus is circumferential and separates the atria from the ventricles. The anterior and posterior interventricular sulci or grooves separate the ventricles.

Detailed explanation-3: -Answer and Explanation: The groove that separates the atria from the ventricle is called the coronary sulcus. The interventricular septum separates the two ventricles from each other.

Detailed explanation-4: -The word sulcus is an anatomical term used to refer to any of the narrow grooves in an organ or tissue. Thus, the atrioventricular sulcus points to the sulcus separating the atria from the ventricles of the heart. Because of this, it is also sometimes called the coronary sulcus or coronary groove.