• (digestive system) A group of organs stretching from the MOUTH to the ANUS, serving to breakdown foods, assimilate nutrients, and eliminate waste. In humans, the digestive system includes the GASTROINTESTINAL TRACT and the accessory glands (LIVER; BILIARY TRACT; PANCREAS).
  NLM Medical Subject Headings
  U.S. National Library of Medicine, 2021
• (digestive system) Group of organs stretching from the mouth to the anus, serving to breakdown foods, assimilate nutrients, and eliminate waste; in humans, the digestive system includes the gastrointestinal tract (mouth, esophagus, stomach, intestines, anus) and the accessory glands (liver, biliary tract, pancreas), and associated hormones and secretions.
  CRISP Thesaurus
  National Institutes of Health, 2006
• (digestive system) The organs that take in food and turn it into products that the body can use to stay healthy. Waste products the body cannot use leave the body through bowel movements. The digestive system includes the salivary glands, mouth, esophagus, stomach, liver, pancreas, gallbladder, small and large intestines, and rectum.
  NCI Dictionary of Cancer Terms
  U.S. National Cancer Institute, 2021
• (digestive system) The system that includes the esophagus, stomach, small and large intestine, anus, liver, biliary tract, and pancreas.
  NCI Thesaurus
  U.S. National Cancer Institute, 2021
• System consists of the gastrointestinal tract, a tube extending from the mouth to the anus; its purpose is to break down food, prepare it for absorption and eliminate waste.
  CRISP Thesaurus
  National Institutes of Health, 2006
• The digestive system, which extends from the mouth to the anus, is responsible for receiving food, breaking it down into nutrients (a process called digestion), absorbing the nutrients into the bloodstream, and eliminating the indigestible parts of food from the body. The digestive tract consists of the�
  Merck Manuals
  Merck & Co., Inc., 2020
• Human digestive system, the system used in the human body for the process of digestion. The human digestive system consists primarily of the digestive tract, or the series of structures and organs through which food and liquids pass during their processing into forms absorbable into the...
  Encyclopedia Britannica
  Encyclopedia Britannica, Inc., 2020