This low power image shows the meninges, spinal cord in cross section and both dorsal roots and their ganglia. In the spinal cord note the grey and white matter, central canal, meninges, ventral median fissure, dorsal sulcus, ventral roots. Note the continuity of the dura matter with perineurium of the spinal nerve. Cracks in the white matter on the left are artifact. Monkey. Trichrome stain.