Final answer:
The Posterior Descending Artery supplies blood to the interventricular septum and portions of both the left and right ventricles, and it is a branch of the right coronary artery.
Step-by-step explanation:
Supply of the Posterior Descending Artery: The Posterior Descending Artery (PDA), also known as the posterior interventricular artery, is a branch of the right coronary artery that is crucial for the blood supply to the heart. This artery travels along the posterior portion of the interventricular sulcus towards the apex of the heart. It primarily supplies blood to the interventricular septum and portions of both the left and right ventricles. The PDA plays a significant role in the coronary circulation, which also includes the anterior interventricular artery and circumflex artery amongst others, in providing oxygenated blood to the heart muscles.