Which artery supplies the anterior portion of the interventricular septum and the anterior walls of both ventricles?

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The artery that supplies the anterior portion of the interventricular septum and the anterior walls of both ventricles is the anterior interventricular artery, also known as the left anterior descending artery. It runs in the anterior interventricular groove and delivers blood to the front two-thirds of the interventricular septum and the anterior surfaces of the ventricles. This artery is a branch of the left coronary artery. The right coronary artery mainly supplies the right side of the heart and, in many people, gives rise to the posterior interventricular artery that nourishes the posterior septum and walls; the marginal artery supplies the lateral aspect of the right ventricle. So the described vessel is the anterior interventricular artery.