Which artery's main role is to supply blood to the anterior parts of the head?

The external carotid artery plays a vital role in supplying blood to the anterior parts of the head, including the face and neck. It branches off from the common carotid artery and gives rise to several important arteries that provide oxygenated blood to areas such as the jaw, scalp, and face. Its branches include the facial artery, maxillary artery, and superficial temporal artery, all of which ensure that the regions of the head receive the necessary blood flow for optimal function and health.

In contrast, the internal carotid artery primarily supplies blood to the brain and does not significantly branch to supply the anterior parts of the head. The occipital artery focuses on providing blood to the posterior scalp and does not cater to the anterior head's needs. The vertebral artery is primarily responsible for supplying blood to the posterior part of the brain and spinal cord instead of the anterior head regions. Therefore, the external carotid artery is the most relevant choice for its role in nourishing the anterior head with blood.