The structure of the nerve fibre layer and neurocord in the enteropneusts.
D000818:Animals; D002816:Chordata, Nonvertebrate / Q000033:anatomy & histology*; D008854:Microscopy, Electron; D009413:Nerve Fibers, Myelinated / Q000166:cytology; D009420:Nervous System / Q000166:cytology; D009474:Neurons / Q000166:cytology*; D013116:Spinal Cord / Q000166:cytology; D013569:Synapses