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The Digestive System:
Process of Digestion
7SCIENCE Fri. Nov. 12
What happens in digestion?
• When food enters the mouth it is beginning
the process of digestion
• Two types:
– Mechanical...
In your mouth
• Tongue and teeth break food into smaller
pieces
• Tongue moves food around and mixes with
saliva
– Saliva ...
In your esophagus and stomach
• No digestion takes place in the esophagus, food is
only moved to the stomach
• In the stom...
In your small intestine
• In the small intestine: Other digestive
juices are added from the liver and
pancreas to break up...
In your large intestine, rectum and
anus
• The remaining food particles enter
the large intestine and their main
job is to...
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The process of digestion

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The process of digestion

  1. 1. The Digestive System: Process of Digestion 7SCIENCE Fri. Nov. 12
  2. 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. 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. 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 mixed by muscular walls – Chemical: digestive juices break down food • Food takes about 4 hours to move through your stomach!
  5. 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. 6. In your large intestine, rectum and anus • The remaining food particles enter the 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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