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Parasympathetic Ganglion. Parasympathetic ganglia (black arrows) contain the cell bodies (perikarya) of postganglionic parasympathetic neurons and represent the site where they synapse with the. preganglionic parasympathetic neurons. These ganglia are usually found within the viscera to be innervated by parasympathetic fibers. The red arrows point to the perikarya of the postganglionic parasympathetic neurons. Parasympathetic ganglia are usually easy to identify in that they are surrounded by viscera (connective tissue, smooth muscle, etc.) and contain 2-5 perikarya. In this slide, the ganglion is surrounded by dense irregular connective tissue.

The image on the right is a higher magnification of that on the left. The red arrows point to the perikarya of the postganglionic parasympathetic neurons. Note the dense irregular connective tissue.