Question

question 47
which of the following assures a continuous supply of blood to the brain?
facial artery
external carotid artery
arterial circle
superficial temporal artery

Explanation:

The arterial circle (Circle of Willis) is a crucial structure in the brain's vascular system. It is formed by the interconnection of major arteries. This interconnection creates a network that allows for collateral circulation. If one of the arteries supplying the brain becomes blocked or restricted, the arterial circle can reroute blood flow through alternative pathways within the circle. This mechanism ensures that the brain continues to receive a continuous supply of oxygen - rich blood.

The facial artery mainly supplies blood to the face. The external carotid artery gives off branches that supply structures outside the cranial cavity such as the face, scalp, and neck. The superficial temporal artery is a branch of the external carotid artery and supplies the scalp. None of these (facial artery, external carotid artery, superficial temporal artery) have the specific anatomical design like the arterial circle to ensure continuous brain blood supply through collateral circulation.

Answer:

Arterial circle