Organs of Digestion

Organs of Digestion Name ______Period ______Date ______

Go to the Organs of Digestion website from the link on our class website. It is at: http://highered.mcgraw- hill.com/sites/0072495855/student_view0/chapter26/animation__organs_of_digestion.html Play the movie. Push pause at the end of each section so that you can answer the questions about each section.

Introduction

1. What are the 2 primary functions of digestion? a. ______

b. ______

Oral Cavity

2. What is the “oral cavity” commonly called? ______

3. What is “mastication” commonly called? ______

4. Saliva is made by the ______.

5. What are the two functions of saliva? a. ______

b. ______

6. The ______prevents food from entering the respiratory system.

7. The food then passes through the ______(throat) and into the ______(tube) which leads to the ______.

8. The moistened food mass or ______is moved through the esophagus by muscular contractions called ______.

Stomach

9. From the esophagus, the bolus goes to the ______.

10. The stomach lining is folded into ______which allow it to expand.

11. Stomach cells produce ______, ______acid, and ______that ______digest the bolus.

12. The stomach churns, mixing its contents which change into a thick liquid called ______.

Small Intestine.

13. The chyme leaves the stomach through the ______and enters the ______.

14. The small intestine is the major site for ______.

15. The 3 parts of the small intestine are the: ______, the ______, and the ______. Liver and Pancreas

16. ______from the liver and ______from the pancreas enter into the small intestine to help with digestion.

17. Nutrients are absorbed through the ______(lining) and into the blood and lymph (fluid) of the body.

Large Intestine

18. What is left of the chyme passes into the ______.

19. ______and ______are absorbed, turning the chyme into ______.

20. Feces are stored in the ______until they are eliminated through the ______(anus).

Now click on “Go to Interactive”.

Click on the liver (reddish-brown organ).

21. The liver produces ______. Bile is stored in the ______until it is released into the small intestine. Does digestion occur in the liver? ______

22. Bile is delivered to the ______through the bile duct.

23. Bile ______fat (breaks it into small droplets).

24. The liver also removes unwanted substances (toxins) from your ______.

Click on the Gall Bladder (green).

25. The duct (tube) leaving the gall bladder connects to one leaving the ______(yellow). Does digestion occur in the gall bladder? ___

Click on the pancreas (yellow)

26. The pancreas manufactures a mixture of digestive ______that break ______, ______, and ______into small particles. Does digestion occur in the pancreas? ______

27. The digestive enzymes from the pancreas reduce the size of ______, ______, ______, making them easier to absorb.

28. The pancreas also produces bicarbonate which neutralizes the ______in the chyme so it doesn’t cause an ulcer in the ______. (Where did the chyme become acidic? ______)

29. The liver, gall bladder, and pancreas are called ______.