The (1)__ is the most important structure that acts as a relay between the body and the brain. It extends from (2)__ to the lower backbone. It has (3)__ matter in inner surface and (4)__ matter in the periphery.
(1)Spinalcord (2)Medulla (3)Grey (4)White
The spinal cord is the most important structure between the body and the brain. It extends from medulla to the lower backbone. It has grey matter in the inner surface and white matter in the periphery.