title: Observation and isolation of centrioles in spermatozoa of the sea urchin, Hemicentrotus pulcherrimus.
mesh_terms: D000818:Animals; D002458:Cell Fractionation; D008297:Male; D009940:Organoids / Q000648:ultrastructure; D012617:Sea Urchins; D013087:Spermatids / Q000648:ultrastructure; D013091:Spermatogenesis; D013094:Spermatozoa / Q000648:ultrastructure*