title: Spermatogenesis in animals as revealed by electron microscopy. XXII. Development of nuclei and cytoplasmic microtubules in the grasshopper spermatids.
mesh_terms: D000818:Animals; D002467:Cell Nucleus; D007313:Insecta; D008297:Male; D008854:Microscopy, Electron; D009698:Nucleoproteins; D013094:Spermatozoa / Q000166:cytology / Q000254:growth & development*
chemical_list: D009698:Nucleoproteins