title: Dynamics of spermiogenesis in Drosophila melanogaster. V. Head-tail alignment.
mesh_terms: D000818:Animals; D002467:Cell Nucleus / Q000502:physiology / Q000648:ultrastructure; D004331:Drosophila melanogaster / Q000502:physiology*; D008297:Male; D008854:Microscopy, Electron; D013091:Spermatogenesis; D013094:Spermatozoa / Q000502:physiology* / Q000648:ultrastructure