1. The Digestive System

2. Digestion
process of making food usable by breaking it down using enzymes

3. Enzymes
proteins made by the body that make specific reactions occur at a faster rate

4. The Mouth Teeth break the food down mechanically
Saliva helps break down the food chemically
Tongue pushes food around and towards back of throat for swallowing

5. Esophagus & Epiglottis
Stretchy pipe that leads from the back of the throat to the stomach
Epiglottis
flap that covers the windpipe to avoid food going into your lungs

6. 4-layer Basic Plan in the Wall of the Alimentary Canal
Digestive Tract

7. Peristalsis
Peristalsis is a distinctive pattern of smooth muscle contractions that propels foodstuffs distally through the esophagus and intestines

8. The Stomach Stretchy sack that is shaped like a “J”
Has strong muscles and hydrochloric acid that break down the food and pepsin that b/d proteins into amino acids

9. Microscopic Anatomy of the Stomach

10. The Small Intestine Small intestine about 22’ long
Enzymes- bile from the liver concentrates fats and from the pancreas, trypsin continues to b/d proteins, amylase b/d carbohydrates and lipase b/d fats
nutrients diffuse from small intestine to blood

11. Anatomy of the Small Intestine

12. Regions of the Small Intestine

13. Liver, Gall Bladder, & Pancreas
makes bile
1st place that nutrients go from small intestine so harmful substances can be filtered out
Gall bladder
holds bile
Pancreas
makes enzymes to help digest fats and protein

14. Gross Anatomy of the Pancreas

15. The End of the Tract Large Intestine Rectum Anus
About 5’ long, absorbs salts, vitamins, water and minerals
unused parts of food move through to be excreted from the body
Appendix
no purpose
Rectum
solid waste stays here until you have a bowel movement
Anus
opening that solid waste is pushed through

17. THE FINAL END OF THE TRACT