1. Main regions of the alimentary canal and associated organs
Mechanical Digestion?
Chemical
Digestion?

2. Review! Chemical Digestion
Enzymes help to break the food into smaller particles by speeding up chemical reactions in living cells.
Enzymes are not used up…they act as a biological catalyst…
Review!

3. Protein example Enzymes used to break Proteins into smaller particles
Big Molecule of Protein
(for example)
Lots of Smaller Amino-acids
Enzymes used to break Proteins into smaller particles

4. Ingestion
Is the taking in of food into the mouth and swallowing it
Teeth and jaws grind the food into smaller bits
The saliva in the mouth contains enzyme (Amylase) which helps break up food chemically.
The oesophagus is the tube which connects the mouth to the stomach

5. Enzymes in the Alimentary Canal
Amyase

6. Cracker Challenge

7. The Rules of Engagement
The Cracker Challenge states that one must completely chew and swallow five (often six) dry crackers in under 1 minute. Additionally, this must be done without the aid of water or any other beverage. The challenge is notorious for seeming simple in theory but being exceedingly difficult to actually accomplish. Many contenders have fallen into the trap of underestimation.
Read more: Five Saltine Cracker Trick | eHow.com 

8. Why Is The Challenge So Hard?
In order to facilitate easy chewing and swallowing, our mouths produce saliva. The major hurdle standing between you and the glory that comes with completing the Cracker Challenge is that our mouths do not produce saliva fast enough to easily break down five dry crackers as quickly as the challenge calls for. By the second or third cracker, most people will find their mouths bone-dry and be unable to properly swallow the abundance of crumbs.

9. Digestion Is the breaking-up of food into small soluble pieces.
Food in the stomach is mixed up and stored (turned into a soup-like liquid)
Stomach cells make enzymes (Pepsin) and hydrochloric acid are released to aid digestion
This acid also kills bacteria present in food.
Stomach – bag with lots of muscle in its walls…
Food held ~ 1-4 hours, liquids ~ a few minutes

10. Food is then slowly released into the small intestine (gut) where most of the digestion happens.
First part – Duodenum
Where pancreas & bile fluids added joins

11. Small intestine ~ 6 meters long

12. Gall bladder stores bile
In the duodenum (enzymes ~ amylase, trypsin, lipase) from the pancreas are added and bile which is made in the liver is also added.
The bile helps to neutralize the acid from the stomach and also helps to break the fat into little droplets.

13. Enzymes in the Alimentary Canal
Bile

14. Enzymes in the Alimentary Canal
Protease

15. Enzymes in the Alimentary Canal
Lipase