title: Fine structure of the testicular spermatozoa from the channel catfish, Ictalurus punctatus.
mesh_terms: D000818:Animals; D002467:Cell Nucleus / Q000648:ultrastructure; D002502:Centrioles / Q000648:ultrastructure; D004398:Dyneins; D005399:Fishes / Q000033:anatomy & histology*; D008297:Male; D008854:Microscopy, Electron; D008870:Microtubules / Q000648:ultrastructure; D013077:Sperm Head / Q000648:ultrastructure; D013082:Sperm Tail / Q000648:ultrastructure; D013094:Spermatozoa / Q000648:ultrastructure*; D013737:Testis; D014617:Vacuoles / Q000648:ultrastructure
chemical_list: D004398:Dyneins