Digestive SystemThe organs that are involved in the breaking down of food into molecules that can pass through the wall of the digestive tract and can be taken up by the cells. Digestive ProcessesThere are five basic activities that are involved in the digestive process1. Ingestion- The taking of food into the mouth.2. Mixing and movement of food- Involves the muscular contractions (paristalsis) that mix the food and move it along the digestive tract.3. Digestion- The break down of food by mechanical and chemical means.4. Absorption- The passage of food from the digestive tract into the cardiovascular and lymphatic system.5. Defecation- The elimination of indigestible waste.Digestion: Two Stages*Mechanical digestion*Physical breakdown of food into smaller particles by the cutting and grinding action of the teeth and the churning contractions of the stomach and small intestines*Serves to expose more food surface to the actions of the digestive enzymesDigestion: Two Stages*Chemical digestion*
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