"The central canal spans the length of the spinal cord from the caudal angle of the fourth ventricle to the conus medullaris. The space almost acts as a central reference point of the axial spinal cord, lying in the midline within the gray commissure. In fact, the dorsal and ventral portions of the gray commissure are named concerning the central canal. The calibre of the canal is small, and its shape is uniformly elliptical."
"The central canal spans the length of the spinal cord from the caudal angle of the fourth ventricle to the conus medullaris. The space almost acts as a central reference point of the axial spinal cord, lying in the midline within the gray commissure. In fact, the dorsal and ventral portions of the gray commissure are named concerning the central canal. The calibre of the canal is small, and its shape is uniformly elliptical."