Rat: E16-hor-639 1 = Spinal cord,  2 = Vena cardinalis anterior,  3 = Oral/nose cavity,  4 = Ganglion,  5 = Optical nerve,  6 = Retina,  7 = Lens,  8 = Cornea,  9 = Telencephalon (transition bulbus olfactorius). Rager staining.Horizontal section acquired with a a 2.5x objective

http://www.vcbio.science.ru.nl/en/virtuallessons/embryology/rat-E16-hor-639/print/