1. Notes: Large Intestine Thursday 1-7-10

3. (1) Overall Function Reabsorb water Pass out remaining waste to rectum + anus

5. (2) Regions Cecum = 1 st Chamber Ascending Colon = Upwards Transverse Colon = Across Descending Colon = Downwards Rectum & Anus

7. (3) Appendix Sits beneath cecum Often collects waste and bacteria  Appendicitis Functions: – Produces white blood cells and antibodies for immunity. – Used to serve a role in cellulose digestion. – Not needed  Weeded out through Evolution?!?

9. (4) Passing Through Waste slowly moves through Large Intestine. – Total Length = 1.5-2m long Water reabsorbed through microvilli. – Result = Solidified waste mass (Feces)

12. (5) Colon Bacteria Over 700 species of bacteria Origins: – Food Eaten – Anus Helpful: – Metabolize left over proteins – Metabolize indigestible carbohydrates – Produce vitamins from inorganics

14. (6) Rectum & Anus Rectum = Inside part Anus = Outside part = Butthole Mechanism: – Remaining waste drops first into rectum – Lands on top of Involuntary Sphincter – Opens w/pressure – Lands on top of Voluntary Sphincter – Made of Skeletal Muscle that you control