Cranial nerves III, VII, and IX supply the entire parasympathetic innervation of the head; however, only the preganglionic fibers lie within these three pairs of cranial nerves.

Question

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Cranial nerves III, VII, and IX carry preganglionic parasympathetic fibers to ganglia in the head, where they synapse with postganglionic neurons that then innervate target structures.

Cranial Nerves III, VII, and IX Supply the Entire Parasympathetic