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DIGESTIVE SYSTEM By: Jamie Casselman. What is the digestive system? A complex group of organs and glands that process the food we eat

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Presentation on theme: "DIGESTIVE SYSTEM By: Jamie Casselman. What is the digestive system? A complex group of organs and glands that process the food we eat"— Presentation transcript:

1 DIGESTIVE SYSTEM By: Jamie Casselman

2 What is the digestive system? A complex group of organs and glands that process the food we eat http://www.caribexams.org/files/files/digestive_system.gif

3 It mechanically and chemically breakdowns food into smaller molecules which can be absorbed into the blood stream Excretes waste materials your body can’t use

4 1. Ingestion 2. Digestion 3. Absorption 4. Elimination

5 Process of putting food or drink into your mouth http://lerablog.org/wp-content/uploads/2013/07/bad-eating-habbit.jpg

6 Mechanical:  Begins in the mouth with the teeth and tongue chewing food into pieces you can swallow Chemical:  Salivary glands produce enzymes (amylase), which breaks down complex carbohydrates to simple ones

7 Swallow Peristalsis

8 Small intestine:  occurs in the last five meters of called the jejunum and ileum  villi increase the rate of absorption of nutrients Large intestine:  Accepts what the small intestine doesn’t absorb  Absorbs more water and concentrates the wastes

9  Undigested materials (feces) from the large intestine pass into the rectum and are eliminated through the anus http://www.almightydad.com/wp-content/uploads/2009/06/baby-in-toilet.jpg

10 Bibliography “Digestive system.” Innerbody.com. 15 September 2013..http://www.innerbody.com/image/digeov.html “Human digestive system.” Enchanted learning.com. 20 September 2013..http://www.enchantedlearning.com/subjects/anatomy/digestive.html McGraw-Hill Ryerson., 2006. BC Science 8. Ontario: McGraw-Hill Ryerson Limited, 2006. Parker, Nancy Winslow. Organs. New York: Greenwillow Books, 2009.


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