Final answer:
Ventral/dorsal roots and ventral/dorsal rami differ in their composition and function.
Step-by-step explanation:
The ventral and dorsal roots are part of the spinal nerves, while the ventral and dorsal rami are branches of these nerves.
The ventral root contains only motor neurons that carry signals from the spinal cord to the muscles and other effectors, while the dorsal root contains only sensory neurons that carry signals from the periphery to the spinal cord.
In contrast, the ventral and dorsal rami contain both sensory and motor fibers, and they innervate different regions of the body.