title: Epididymal maturation of rat spermatozoa studied by thin sectioning and freeze-fracture.
mesh_terms: D000177:Acrosome / Q000032:analysis; D000818:Animals; D002462:Cell Membrane / Q000032:analysis; D004822:Epididymis / Q000502:physiology*; D005614:Freeze Fracturing / Q000379:methods; D008297:Male; D051381:Rats; D013094:Spermatozoa / Q000254:growth & development* / Q000648:ultrastructure