How much of the vertebral canal does the spinal cord occupy?
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The spinal cord is a long, thin, tubular bundle of nervous tissue that extends from the medulla oblongata in the brainstem to the lumbar region of the vertebral column. The spinal cord is protected by a bony structure called the vertebral column, which consists of a series of vertebrae stacked on top of each other. Within each vertebra, there is a vertebral canal that houses the spinal cord and other structures such as nerves and blood vessels.
The spinal cord occupies approximately two-thirds of the vertebral canal. The remaining one-third of the vertebral canal contains structures such as the meninges (the protective coverings around the spinal cord), cerebrospinal fluid (the fluid that surrounds and cushions the spinal cord), and other supporting tissues.
It is important to note that the size of the vertebral canal and the amount of space the spinal cord occupies may vary throughout the length of the vertebral column. For instance, the cervical (neck) region of the vertebral column has a larger vertebral canal relative to the size of the spinal cord than the thoracic (chest) region.
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