Blood Tracing- Circle of Willis

Question 1

The ____ is supplied with blood by means of the common carotid arteries and the vertebral arteries.

Answer 1

Brain

Question 2

The right common carotid artery arises from the innominate artery and the left common carotid artery arises from the arch of the aorta. Right right and left vertebral arteries arise from the corresponding:

Answer 2

Subclavian Arteries

Question 3

The right and left vertebral arteries extend upwards to the base of the brain where they unite to form the:

Answer 3

Basilar Artery

Question 4

The basilar artery branches into the:

Answer 4

Right and Left Posterior Cerebral Arteries

Question 5

The right and left common carotid arteries extend upwards along the trachea until they reach the upper border of the thyroid cartilage where they subdivide into the:

Answer 5

External and Internal Carotid Arteries

Question 6

1. Supply blood to the head and neck.
2. Supply the brain and also the eyes and nose.

Answer 6

1. External Carotid Arteries
2. Internal Carotid Arteries

Question 7

The first major branch of the internal carotid artery.

• Carries blood to the eye.

Answer 7

Opthalmic Artery

Question 8

The first principal branch of the internal carotid artery is the opthalmic artery, the other branches go to the:

Answer 8

Brain

Question 9

When the right and left internal carotid arteries reach the base of the brain, they divide into several branches. The first branches are the:

Answer 9

Posterior Communicating Arteries (Left and Right)

Question 10

The posterior communicating arteries lead to the corresponding:

Answer 10

Posterior Cerebral Arteries

Question 11

After giving off the first branch, the internal carotid artery subdivides into two parts:

Answer 11

Anterior Cerebral Artery and Middle Cerebral Artery

Question 12

The right and left anterior cerebral arteries are connected by means of the:

Answer 12

Anterior Communicating Artery

Question 13

The Circle of Willis is formed by the ___ ___ ___, which are branches of the internal carotid arteries.

Answer 13

Anterior Cerebral Arteries

Question 14

From the cerebral arteries, the blood flows to all parts of the brain. From the brain, the blood flows into the:

Answer 14

Cerebral Veins

Question 15

From the cerebral veins, the blood flows into various cranial venous sinuses. The uppermost of these is the:

Answer 15

Superior Sagittal Sinus

Question 16

The superior sagittal sinus connects with the:

Answer 16

Straight Sinus

Question 17

The superior sagittal sinus connects with the straight sinus to form the paired:

Answer 17

Right and Left Transverse Sinuses

Question 18

Leading into the straight sinus is the:

Answer 18

Inferior Sagittal Sinus

Question 19

The paired transverse sinuses lead into the:

Answer 19

Right and Left Internal Jugular Veins

Question 20

The right and left internal jugular veins join the right and left subclavian veins to form the:

Answer 20

Right and Left Innominate (Brachiocephalic) Veins

Question 21

The right and left Innominate (Brachiocephalic) veins lead to the ___1___, which in turn leads into the __2__.

Answer 21

1. Superior Vena Cava
2. Right Atrium of the Heart