The sleeping gut.
D000328:Adult; D001003:Anal Canal / Q000502:physiology; D003106:Colon / Q000502:physiology; D003679:Deglutition; D004068:Digestive System Physiological Phenomena; D004947:Esophagus / Q000502:physiology; D005744:Gastric Acid / Q000378:metabolism; D005753:Gastric Mucosa / Q000378:metabolism; D005769:Gastrointestinal Motility; D006801:Humans; D007421:Intestine, Small / Q000502:physiology; D008297:Male; D012007:Rectum / Q000502:physiology; D012890:Sleep / Q000502:physiology*; D012894:Sleep Stages / Q000502:physiology