Unmyelinated fibers in the ventral root.
D000818:Animals; D001369:Axons; D002415:Cats; D008161:Lumbosacral Region; D008854:Microscopy, Electron; D009413:Nerve Fibers, Myelinated / Q000033:anatomy & histology; D009431:Neural Conduction; D013116:Spinal Cord / Q000033:anatomy & histology*; D013126:Spinal Nerve Roots / Q000033:anatomy & histology / Q000502:physiology