Some answers to a 2000-year old question: the role(s) of the pineal gland.
D000818:Animals; D001683:Biological Clocks; D005075:Biological Evolution; D005246:Feedback; D006066:Gonads / Q000502:physiology; D006801:Humans; D008550:Melatonin / Q000378:metabolism; D010507:Periodicity; D010870:Pineal Gland / Q000378:metabolism / Q000502:physiology*; D012098:Reproduction
D008550:Melatonin