Spinal Cord Facts:
A thick cylinder of nerve tissue that runs down the central canal of the spinal column. The spinal cord is an extension of the brain, and together with the brain forms the central nervous system.
The spinal cord originates at the lower (inferior) end of the medulla oblongata, at the bottom of the brainstem. It leaves the skull via a large opening called the foramen magnum, and extends about two-thirds of the way down the spine, as far as the first lumbar vertebra.
The spinal cord is unique to the nervous system of vertebrates. In an adult human it is about 45 cm (18 in.) long and roughly as thick as a finger. Spinal nerves from the spinal cord branch off to various parts of the body.
A thick cylinder of nerve tissue that runs down the central canal of the spinal column. The spinal cord is an extension of the brain, and together with the brain forms the central nervous system.
The spinal cord originates at the lower (inferior) end of the medulla oblongata, at the bottom of the brainstem. It leaves the skull via a large opening called the foramen magnum, and extends about two-thirds of the way down the spine, as far as the first lumbar vertebra.
The spinal cord is unique to the nervous system of vertebrates. In an adult human it is about 45 cm (18 in.) long and roughly as thick as a finger. Spinal nerves from the spinal cord branch off to various parts of the body.
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