Anterior and posterior interventricular/longitudinal sulci (singular sulcus).
atrioventricular valves
anterior interventricular
blood and oxygen
the septum seperates the left and right ventricles
the interventricular sulcus is the groove that separates the ventricles
The septum; it's a muscle that seperates your right and left ventricles.
Inferior surface of the heart is formed by Right atrium and Right ventricles
according to the college level anatomy and physiology book "holes" 12th edition it describes these elevations as being the interatrial septum which seperates the right from the left atrium, and an interventricular septum which seperates the right and left ventricles.
the ventricles
the lower heart.
The right ventricle pumps blood to the lungs.
haemaglobin
There is no valve between the right and left ventricles. The interventricular septum separates the ventricles.
The Great Coronary Vein drains the muscles of the heart. It ascends the anterior interventricular sulcus (groove between the two ventricles) around the left coronary groove (groove between the left atrium and left ventricle) and into the coronary sinus on the right atrium of the heart.
The lower heart chambers are ventricles. Atria are the upper chambers of the heart.