Final answer:
The coronary sulcus contains the coronary sinus, a large vein draining into the right atrium. The anterior and posterior interventricular sulci are grooves on the heart's surface housing coronary vessels like arteries and veins, with the anterior interventricular artery running along the anterior groove.
Step-by-step explanation:
The coronary sulcus and interventricular sulci are significant surface features of the heart. The coronary sulcus, also known as the atrioventricular sulcus, is a deep groove that marks the boundary between the atria and the ventricles. Within this sulcus lies the coronary sinus, which is a large vein that drains the heart myocardium directly into the right atrium.The interventricular sulci include the anterior and posterior interventricular sulci and are located on the anterior and posterior surfaces of the heart, respectively. They are not as deep as the coronary sulcus. These grooves house important coronary vessels such as arteries and veins. Specifically, the anterior interventricular artery runs along the anterior interventricular sulcus and supplies blood to the heart tissue, while the posterior interventricular sulcus parallels the coronary sinus on the posterior surface.
Overall, these sulci are fat-filled grooves that are prominently visible on the heart's surface and are essential pathways for the blood vessels that supply and drain the heart muscle.