Final answer:
A dorsal root ganglion is a swelling containing sensory cell bodies.
Step-by-step explanation:
A dorsal root ganglion is a swelling containing sensory cell bodies. It is an enlargement of the dorsal nerve root. These ganglia are grouped in structures called dorsal root ganglia and consist of the cell bodies of neurons with axons that are sensory endings in the periphery, such as in the skin.