An injury to the spinal cord at the level may be fatal because control of the muscles of breathing arise from the spinal cord at this level.

Im fairly sure this is the cervical level

i can't see the full page, therefore, can't answer it

explanation:

explanation:

the fossil record extends back to a dog-like ancestor some 55 million years ago, which gave rise to the first horse-like species 55 to 42 million years ago in the genus eohippus.