ANATOMY

Detailed explanation-1: -The brain receives blood from two sources: the internal carotid arteries, which arise at the point in the neck where the common carotid arteries bifurcate, and the vertebral arteries (Figure 1.20). The internal carotid arteries branch to form two major cerebral arteries, the anterior and middle cerebral arteries.

Detailed explanation-2: -A few major arteries supply blood to the brain. These include the cerebral arteries in the brain. They get blood from the carotid and vertebral arteries on each side of the head and neck. These arteries get blood from the aorta, the large blood vessel at the top of the heart.

Detailed explanation-3: -The internal carotid artery, being one of the most clinically relevant and vital arteries, supplies oxygenated blood to crucial structures such as the brain and eyes.

Detailed explanation-4: -There are two carotid arteries, one on the right and one on the left. In the neck, each carotid artery branches into two divisions: The internal carotid artery supplies blood to the brain. The external carotid artery supplies blood to the face and neck.

Detailed explanation-5: -The internal carotid artery runs upward through the neck and enters the skull through the carotid canal, located in the petrous portion of the temporal bone just superior to the jugular fossa.