Final answer:
The left anterior descending coronary artery (LAD) originates from the left coronary artery. It is the second major branch of the left coronary artery and follows the anterior interventricular sulcus around the pulmonary trunk.
Step-by-step explanation:
The left coronary artery is the source of the left anterior descending coronary artery (LAD). Known by another name, the anterior interventricular artery, it is the second major branch of the left coronary artery. Around the pulmonary trunk, the left anterior descending coronary artery (LAD) follows the anterior interventricular sulcus. During its path, it produces smaller branches that form anastomoses with the posterior interventricular artery's branches.