Final answer:
The sensory neurons of spinal nerves have their cell bodies located in the dorsal root ganglia of the spinal cord, serving as a critical relay for sensory information.
Step-by-step explanation:
The cell bodies of the sensory neurons of the spinal nerves are located in the dorsal root ganglia of the spinal cord. These ganglia consist of unipolar sensory neurons, where each sensory neuron has one projection with a sensory receptor ending, such as in the skin, muscle, or sensory organs, and another projection that synapses with a neuron in the dorsal spinal cord. The dorsal root ganglia act as a relay point for sensory information that travels from the periphery of the body to the central nervous system (CNS).