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Ingestion
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Place food in the mouth. Taking food into the body.
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Mechanical Processing
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Chewing
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Digestion
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Is the breakdown of large food items into smaller molecules
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What are the two types of digestion
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Mechanical digestion and Chemical digestion
Mechanical- chewing
Chemical- breakdown by using enzymes
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What are the functions of the Digestive system?
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Ingestion
Mechanical processing
Digestion
Secretion
Absorption
compaction
Elimination
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Absorption
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Starts in the the small intestine
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Compaction
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Undigested food becomes compacted
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What is a oral cavity?
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The stomach
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Secretion
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Is the process by which you are producing and releasing mucin or fluids such as acid, bile and digestive enzymes.
- it is both chemical and Mechachical
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Properties of the Gi tract
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- A hollow tube- 25 ft long (7.5meters) long -changes shape - several glands secrete into tube - it devides into an upper and a lower GI tract |
Digestive system def:
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Is composed of the GI tract and accessory digestive orgnas that assit the GI tract in the process of digestion.
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Where does the GI tract start and End?
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It starts at the mouth and ends at the Anus
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Oral Cavity
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Receives food and begins digestion by mechanically breaking up the solid food particles into smaller pieces and mixing them with saliva. |
Parts of the Oral Cavity:
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1. Plate
2. Tongue
3. Vestibule
4. Teeth
5. Frenulum
6. Salivary ducts
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Adult teeth:
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Central incisor (7-8yrs) Canine (11-12yrs) 1st premolar (10-11yrs) -1st molar (6-7yrs) -2nd moler (12-13yrs) -3rd moler (17-25yrs) |