title: Observations on the developing tail of the drake spermatid.
mesh_terms: D000818:Animals; D004372:Ducks / Q000033:anatomy & histology*; D008297:Male; D013082:Sperm Tail / Q000648:ultrastructure*; D013087:Spermatids / Q000648:ultrastructure*; D013094:Spermatozoa / Q000648:ultrastructure*