Final answer:
The interventricular sulci and coronary sulcus contain fat-filled grooves that mark the boundaries between the heart chambers and contain major coronary blood vessels.
Step-by-step explanation:
The interventricular sulci and coronary sulcus contain fat-filled grooves that are visible on the surface of the heart. These sulci mark the boundaries between the chambers of the heart and are also the locations where major coronary blood vessels are located. The anterior interventricular sulcus is located on the anterior surface of the heart, while the posterior interventricular sulcus is located on the posterior surface of the heart.