Digestive System

1. Digestive System What is digestion and where does it start?

2. The Digestive System • _____________________________________ • _____________________________________ & • _____________________________________

3. Digestion • _________________________ break down of foods • Teeth-break down food into small pieces • __________________________—process of chewing • ___________________ break down of foods • Saliva-___________________________________________________________________________________________________________________________________________________________________________________________________________________________________________. • Both for use by the cells of the body

4. Digestion • Chemical break down of foods • _______________-produced by the salivary glands; the first juices used in the process; break down starches and sugars in foods; lubricates food making it easier to swallow. • _______________ • _______________ • _______________ • _______________

5. Digestion • Tongue • _________________________________________________________________________________________________________________________ • ____________________ • 10” muscular tube that connects the pharynx with the stomach

6. Digestion • Peristalsis • ___________________________________________________________________________________________________________________________ • Esophagus • Stomach • intestines

7. Digestion • _____________________________ • Hollow, sac-like organ surrounded by muscles which allow for expansion during ingestion. • 3 Jobs • ___________________________________ • ___________________________________ • ___________________________________

8. stomach • Mix food with juices: • Secretions from the stomach lining that contain _________________________________,& _________________________________, an enzyme that breaks down proteins • _________________—kills bacteria in food and creates an acidic environment for the pepsin to do its job • _______________________ in the lining of the stomach protects the stomach from being digested in its own juices

9. stomach • Chyme • _______________________________________________________________________________________________________________________________________ • YUCK!!! But it is what it is!!! :~)

10. Indirect Digestive Organs • _____________________________________ • _____________________________________ & • _____________________________________

11. pancreas • Organ that produces enzymes that break down the ____________________, ____________________, and ____________________we consume. • Organ that is essential in insulin (______________ ______________) control.—Diabetes I and II.

12. liver • Organ that produces ___________________ • Yellow-green fluid that helps break down and absorb _______________ • ________________________—when the liver is not functioning properly the skin and eyes can become yellow from an excess of ____________ in the system.

13. gall bladder • _________________________________________________________________________________________________________________________________ • You can live without, but fatty foods will affect the body more than a body with a gall bladder. • Can become filled with painful gall stones

14. Absorption • ____________________________________________________________________________________________________________________________________________________

15. absorption • ______________________ • 20-23’ long • 1” diameter • Finishes digestion and begins absorption in the ______________—finger-like projections in intestines • ______________________ • 5-6’ long • 2.5” diameter • Finishes absorption and begins ______________________

16. Elimination • Expulsion of undigested food or body wastes • Begins with large intestine—eliminate ______________ • Skin excretes some wastes through the pores—__________________ • Lungs expel _________ and other gas wastes • Liquids are filtered to the ___________________________ for expulsion