Archive image from page 430 of The development of the human. The development of the human body : a manual of human embryology . developmentofhum00mcmu Year: 1914 THE SYMPATHETIC SYSTEM 419 ''v - â Fig. 248.âTransverse Section through an Embryo Shark (Scyllium) of ii mm., SHOWING THE ORIGIN OF A SYMPATHETIC GANGLION. Ch, Notochord; E, ectoderm; G, posterior root ganglion; Gs, sympathetic ganglion; .1/, spinal cord.â(Onodi.)

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