Automatic sampling of digesta.
D000018:Abomasum / Q000502:physiology; D000824:Animal Nutritional Physiological Phenomena; D000818:Animals; D001322:Autoanalysis; D002404:Catheterization; D002417:Cattle / Q000502:physiology*; D004063:Digestion; D004068:Digestive System Physiological Phenomena; D004386:Duodenum / Q000502:physiology; D007082:Ileum / Q000502:physiology; D012212:Rheology; D012756:Sheep / Q000502:physiology*; D013279:Stomach, Ruminant / Q000502:physiology