Heart rate of chickens as influenced by age and gonadal hormones.
D000375:Aging; D000818:Animals; D002369:Castration; D002645:Chickens; D042341:Gonadal Hormones; D006062:Gonadotropins / Q000494:pharmacology*; D006321:Heart / Q000502:physiology*; D006339:Heart Rate; D006801:Humans; D008297:Male; D009919:Orchiectomy
D042341:Gonadal Hormones; D006062:Gonadotropins
AGING/effects; CASTRATION/effects; GONADOTROPINS/effects; HEART/physiology