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The PNS represents sensory receptor-endorgans throughout the body and their axonal connections to the CNS through dorsal root ganglial neurons.
The PNS represents sensory receptor-endorgans throughout the body and their axonal connections to the CNS through dorsal root ganglial neurons.
The PNS extends, also, from the CNS as axons of motor neurons to body structures for innervating skeletal muscle and glands.
CNS autonomic motor axons project to peripheral ganglia where they synapse with second level peripheral neurons that innervate glands or smooth muscle directly.
The CNS (brain and cord) develops as a neurotube that is contained within a pial lamina. This enclosing lamina is formed of a basement membrane (BM) that envelops the PNS and follows the vasculature into the CNS.