Fig. 5.10. Lower figure: The node of Ranvier (arrows) is much shorter in peripheral nerve than in central nervous system tissue. m – myelin; ax – axon. Scale = 1 µm. (Rat, trigeminal nerve.) Upper figure: Light microscopy of the node of Ranvier (arrow) as it appears in HE stained longitudinal paraffin section of peripheral nerve. m – myelin; ax – axon. (Human, peripheral nerve.) Download the high resolution image (a); Download the high resolution image (b).