1. Digestive System Functions (The Alimentary Canal)

2. Joke of the Day:

3. Alimentary Canal:
The passage (including the esophagus, stomach, and intestines) that food passes through the body from mouth to anus

4. Types of Digestion
Mechanical (M): Chewing, churning of food in stomache
Chemical (C): Enzymes – From the Mouth to the Small Intestine

5. Mouth (M,C) First Site of Digestion!
(M) chewing
(C) Salivary Amylase breaks down starch

6. Pharynx(M)
Initiates swallowing

7. Esophagus (M)
Transports food from mouth to stomach through “Peristalsis”
Peristaltic Waves: Waves of muscular contractions that propel contents from one point to another

8. Stomach(M,C) (process food then transport)
(M) churning to create a “Bolus”
Bolus: Creamy paste that forms as the food in th stomach is repeatedly mixed with gastric juices
(C) HCl, pepsin kill bacteria and break down proteins

9. Duodenum(C)
1ST 10 inches of small intestine. Bile secreted here.

10. Jejunum(M,C) Next 8 feet of small intestine.
Food absorption, enzyme action.

11. Ileum (M,C) “Terminal” portion of the small intestine
Absorption of food, enzyme action

12. Ascending colon(M) Part 1 of the Large Intestine.
Water, Nutrient and Electrolyte absorption

13. Transverse colon(M) Part 2 of the Large Intestine
Water, Nutrient and Electrolyte absorption

14. Descending colon(M) Part 3 of the Large Intestine
Water, Nutrient and Electrolyte absorption

15. Sigmoid colon(M)
Water and Electrolyte absorption

16. Rectum(M)
Storage of feces

17. Anal canal(M)
Sphincter for “waste management”

18. Warning – Prolapsed rectum ahead!

19. Prolapsed rectum

20. Laproscopic Nissen Fundoplication