Final answer:
The interventricular vessels can be found within the interventricular septum, which is the structure between the two ventricles of the heart. This septum is thick and is able to handle the force of the ventricles' contractions.
Step-by-step explanation:
The interventricular vessels run within the interventricular septum, a structure found between the two ventricles. This septum is normally intact after fetal development and is designed to withstand the high pressure generated by the ventricles during contraction. The anterior interventricular sulcus is a groove located between the left and right ventricles on the anterior surface of the heart, where the large anterior interventricular artery, also known as the left anterior descending artery (LAD), traverses around the pulmonary trunk, distributing blood to the left side of the heart and the interventricular septum.