Is it farther or further?
afferent af·fer·ent (āf'ər-ənt)
Carrying inward to a central organ or section, as nerves that conduct impulses from the periphery of the body to the brain or spinal cord. n.
An afferent organ or body part, such as a blood vessel.
Carrying sensory information toward a central organ or part, as a nerve that conducts impulses from the periphery of the body to the central nervous system. Compare efferent.