Humors and hormones.
D000311:Adrenal Glands / Q000502:physiology; D001775:Blood Circulation; D049669:History, 16th Century; D049670:History, 17th Century; D049671:History, 18th Century; D049672:History, 19th Century; D049673:History, 20th Century; D049690:History, Ancient; D006728:Hormones / Q000266:history / Q000502:physiology*; D006801:Humans; D007668:Kidney / Q000502:physiology; D013564:Sympathetic Nervous System / Q000502:physiology
D006728:Hormones