Tags: Anatomical Structure.
Throughout the cervical and thoracic regions the central canal is situated in the anterior third of the medulla spinalis; in the lumbar enlargement it is near the middle and in the conus medullaris it approaches the posterior surface. It is filled with cerebrospinal fluid and lined by ciliated columnar epithelium outside of which is an encircling band of gelatinous substance the substantia gelatinosa centralis (or central gelatinous substance of spinal cord).
