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any of the ganglia of the autonomic system whose unmyelinated fibers innervate the internal organs

any of the ganglia of the autonomic system whose unmyelinated fibers innervate the internal organs

Clusters of neurons and their processes in the autonomic nervous system. In the autonomic ganglia, the preganglionic fibers from the central nervous system synapse onto the neurons whose axons are the postganglionic fibers innervating target organs. The ganglia also contain intrinsic neurons and supporting cells and preganglionic fibers passing through to other ganglia.