Bull sperm and mycoplasma.
D000818:Animals; D002417:Cattle / Q000502:physiology*; D008297:Male; D009174:Mycoplasma / Q000502:physiology*; D013077:Sperm Head / Q000648:ultrastructure*; D013081:Sperm Motility; D013094:Spermatozoa / Q000648:ultrastructure*