1. Spinal cord is a long and cylindrical structure.
2. It passess through vertebral column extending all along the dorsal surface of trunk.
3. In other words, vertebrae of the vertebral column protect the spinal cord from injuries.
4. In a cross section of the spinal cord, the grey matter appears like butterfly or in the shape of letter ‘H’.
5. Each segment of the ‘H’ shaped grey matter is called a horn.
6. The upper horns are called dorsal horns, and the lower horns are called ventral horns.
7. In the middle of the grey matter is a canal called spinal canal.
8. It runs all along the length of spinal cord and is filled with cerebrospinal fluid.
9. From the sides of spinal cord, 31 pairs of nerves take their origin and supply branches to various parts of the body.
