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The Digestive System: Process of Digestion

The Digestive System: Process of Digestion. What happens in digestion?. When food enters the mouth it is beginning the process of digestion Two types: Mechanical Food is chewed and mixed in the mouth and mixes in your stomach Chemical

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The Digestive System: Process of Digestion

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  1. The Digestive System: Process of Digestion

  2. What happens in digestion? • When food enters the mouth it is beginning the process of digestion • Two types: • Mechanical • Food is chewed and mixed in the mouth and mixes in your stomach • Chemical • Breaks food down into many different, smaller parts so they may be used by cells • Takes place in the mouth, stomach and small intestine

  3. In your mouth • Tongue and teeth break food into smaller pieces • Tongue moves food around and mixes with saliva • Saliva is a type of enzyme (chemical) in the digestive system that helps to break food down faster

  4. In your esophagus and stomach • No digestion takes place in the esophagus, food is only moved to the stomach • In the stomach, mechanical and chemical digestion takes place • Mechanical: food is mixedmuscular walls • Chemical: digestive juices break down food • Food takes about 4 hours to move through your stomach!

  5. In your small intestine • In the small intestine: Other digestive juices are added from the liver and pancreas to break up nutrients like fat • Think about adding soap to a greasy/fatty plate • Villi (finger-like) line the small intestine walls and nutrients from the small intestine enter your blood through the villi by diffusion and osmosis

  6. In your large intestine, rectum and anus • The remaining food particles enterthe large intestine and their main job is to absorb the water from the waste • The solid waste is moved to the rectum and when it is ready to be released, moves out the anus

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