The laws and mechanics of circulation, with the principle involved in animal movement . law applying to both ?). The nerves are situated in the tunica adventitia, and form apretty dense plexus—the plexus spermaticus—in a portiondistant from the cremaster internus, and are derived from thespermatic and sympathetic. From the plexus spermaticusissue several smaller nerve-trunks, which penetrate the mus-cular and mucous layers of the vas deferens, where they areobserved to have medullated fibres (Klein).* In the upperportions of the vas deferens small ganglion cells are scatteredin the nerve-trunk
The laws and mechanics of circulation, with the principle involved in animal movement . law applying to both ?). The nerves are situated in the tunica adventitia, and form apretty dense plexus—the plexus spermaticus—in a portiondistant from the cremaster internus, and are derived from thespermatic and sympathetic. From the plexus spermaticusissue several smaller nerve-trunks, which penetrate the mus-cular and mucous layers of the vas deferens, where they areobserved to have medullated fibres (Klein).* In the upperportions of the vas deferens small ganglion cells are scatteredin the nerve-trunks of this plexus, and also in those trunkslying more externally and running separately. In the neigh-borhood of the ampullae, however, there are some quite feebly- * Striekers Manual of Histology. Art., Male and Female External GenitalOrgans ; together with their Glandular Appendages, p. 584. By E. Klein. 496 DUALISM IN NERVOUS FORCE. developed ganglion cells. It will thus be seen the nervoussupply to the organ for producing and coordinating the move-ments spoken of is Jltl/Jlt EjaetiUUryduct Fig. 207.—Base of the Bladder with the Vasa Deferentia and Vesicula? Gray. §bv^Olv
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