title: The morphogenesis of vertebrate perforatorium.
mesh_terms: D000177:Acrosome / Q000648:ultrastructure; D000199:Actins; D000818:Animals; D001717:Birds / Q000033:anatomy & histology* / Q000502:physiology; D002467:Cell Nucleus / Q000648:ultrastructure; D006801:Humans; D008297:Male; D008854:Microscopy, Electron; D009024:Morphogenesis; D009940:Organoids / Q000648:ultrastructure; D051381:Rats / Q000033:anatomy & histology* / Q000502:physiology; D013091:Spermatogenesis; D013094:Spermatozoa / Q000648:ultrastructure*
chemical_list: D000199:Actins