Glossary alimentary canal: tubular digestive system with a mouth and anus anus: exit point for waste material bile: digestive juice produced by the liver; important for digestion of lipids bolus: mass of food resulting from chewing action and wetting by saliva carnivore: animal that consumes animal flesh chyme: mixture of partially digested food and stomach juices digestion: mechanical and chemical break down of food into small organic fragments duodenum: first part of the small intestine where a large part of digestion of carbohydrates and fats occurs endocrine system: system that controls the response of the various glands in the body and the release of hormones at the appropriate times esophagus: tubular organ that connects the mouth to the stomach essential nutrient: nutrient that cannot be synthesized by the body; it must be obtained from food gallbladder: organ that stores and concentrates bile ...