Fine structure of the sperm head in some mammals, with particular reference to the acrosome and the subacrosomal substance.
D000818:Animals; D002415:Cats; D002417:Cattle; D004285:Dogs; D005306:Fertilization; D006168:Guinea Pigs; D006736:Horses; D008297:Male; D011817:Rabbits; D012756:Sheep; D013094:Spermatozoa / Q000166:cytology*; D013552:Swine