Final answer:
The right and left vertebral arteries originate from the subclavian artery.
Step-by-step explanation:
The right and left vertebral arteries originate from the subclavian artery. The right vertebral artery arises from the brachiocephalic artery, while the left vertebral artery arises directly from the aortic arch. The right and left vertebral arteries originate from different vessels. The right vertebral artery arises from the right subclavian artery, which in turn originates from the brachiocephalic artery. Conversely, the left vertebral artery comes directly from the aortic arch. Both vertebral arteries play critical roles in supplying blood to the central nervous system, including the brain and spinal cord.