Q: In vertebrates, what structure runs from the brain to the tail end of the backbone?


Read this paragraph and choose the correct option from the provided answers:

Vertebrates have a centralized nervous system. As shown in Figure below , the nervous system consists of a brain in the head region. It also includes a long spinal cord that runs from the brain to the tail end of the backbone. Long nerve fibers extend from the spinal cord to muscles and organs throughout the body.

 Choices:

- ribcage

- aortic valve

- backbone

- spinal cord


A:
spinal cord