The spinal cord?

Answer:
The spinal cord is basically your spine. It carries messages between your brain and the rest of the body.

Your spinal cord is a slender nerve column that goes from your brain to your vertebral column. It starts with the foramen magnum and has 31 segments (vertebrae).

There are 8 cervical vertebrae, which control nerve impulses in your upper limbs. There are 12 thoracic and 5 lumbar vertebrae, which control the nerve impulses in your upper limbs. There are also 5 sacral and finally 1 coccygeal vertebraes

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