The lymphatics of the brain and spinal cord are peculiar, inasmuch as they open into the subarachnoid space, and are only indirectly connected with the general lymphatic and venous systems. The communications with the venous system are effected by the Pacchio- nian bodies. The lymphatics of the peripheral nerves are in the form of tubular spaces placed between the lamellae of the perinem-al sheaths. These tubular channels open into the subdural and subarachnoid spaces.
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