Final answer:
The structure that carries sensory neurons into the spinal cord is the dorsal root.
Step-by-step explanation:
The structure that carries sensory neurons into the spinal cord, conveying information from the receptors is the dorsal root. As mentioned in the provided information, the dorsal root contains only the axons of sensory neurons, whereas the ventral roots contain only the axons of the motor neurons. These sensory neurons transmit sensory information from the body to the brain through synapses with neurons in the dorsal spinal cord.