Out and Away: Neuroepithelial cells in an embryonic rat spinal cord
The embryo has the demanding task of dedicating and specializing just a sheet of cells to become one of the most complex and mysterious structures in all of biology: the brain. The early brain actually begins as a thin tube called the neural tube. The neural tube produces neurons that migrate outward, eventually becoming the brain and spinal cord. Seen here are early neurons, called neuroepithelial cells, adjacent to the tube.
Image by Dr. Janelle Pakan, University College Cork.