Which of these pathways correctly traces blood as it travels from the aortic arch to the left arm?
A) aortic arch, brachiocephalic trunk, right common carotid artery
B) aortic arch, left common carotid artery, left internal carotid artery
C) aortic arch, left subclavian artery, left axillary artery, left brachial artery
D) ascending aorta, right coronary arteries
E) abdominal aorta, celiac trunk, left gastric artery

Question

Quizplus · Accepted Answer

The left arm is supplied by the left subclavian artery, which branches off the aortic arch. From the left subclavian artery, blood travels to the left axillary artery and then to the left brachial artery, which supplies the arm. Therefore, option C correctly traces the path of blood from the aortic arch to the left arm. Option A refers to the right common carotid artery, which does not supply blood to the left arm. Option B refers to the left internal carotid artery, which supplies blood to the brain but not the left arm. Option D refers to the right coronary arteries, which supply blood to the heart. Option E refers to the left gastric artery, which supplies blood to the stomach.

Which of These Pathways Correctly Traces Blood as It Travels