title: The onset of synapse formation in spinal cord cultures as studied by electron microscopy.
mesh_terms: D000818:Animals; D002462:Cell Membrane; D005333:Fetus; D066298:In Vitro Techniques; D008854:Microscopy, Electron; D051381:Rats; D013116:Spinal Cord / Q000033:anatomy & histology / Q000254:growth & development*; D013569:Synapses / Q000033:anatomy & histology / Q000254:growth & development*