Digestive System Webquest s1

Name ______Date ______Period ______Digestive System Webquest So there you are, sitting at lunch, enjoying some grilled chicken pizza and a few orange wedges. When you're finished, you take a last drink of milk, wipe your mouth, and head to your next class. In a few minutes you're thinking about the capital of Oregon or your science fair project. You've completely forgotten about that pizza lunch you just ate. But it's still in your stomach - sort of like a science experiment that happens all the time! Your digestive system started working even before you took the first bite of your pizza. And the digestive system will be busy at work on your chewed-up lunch for the next few hours - or sometimes days - depending upon what you've eaten. This process, called digestion, allows your body to get the nutrients and energy it needs from the food you eat. So let's find out what's happening to that pizza, orange, and milk. Site 1: http://www.acm.uiuc.edu/sigbio/project/digestive/index.html

Why Digestion? 1. Name the two main functions of the digestive system.

2. What are two other names for the digestive tract?

Early Digestion: The Mouth 3. What are the digestive purposes of the mouth?

4. Name the different types of teeth and describe the function of each.

6. What is a bolus? Early Digestion: The Salivary Glands 7. Name and describe the location of the three pair of salivary glands. 8. What is the function of saliva?

Early Digestion: The Pharynx and Esophagus 9. Describe the process by which food moves through the pharynx and esophagus.

Middle Digestion: The Stomach 10. What is the stomach opening called? What is its purpose?

11. What is the mixture called here?

12. What are the stomach folds called? What do they secrete?

13. What closes off the stomach from the small intestine?

Middle Digestion: The Liver, Gall Bladder and Pancreas 14. What are the functions of the liver? 15. What is the function of the gallbladder?

16. Why is pancreatic juice so important?

Late Digestion: The Small Intestine 17. What are the three parts of the small intestine?

18. What is the function of villi?

19. What is the function of the duodenum?

Late Digestion: The Large Intestine and Rectum 20. How is fecal material different from chyme?

21. Trace the path of the fecal material.

22. What controls the anus? Site 2: http://www.kidshealth.org/teen/your_body/body_basics/digestive_system.html  Click on “Body Basics: Digestive System” in the blue box.  Click on each organ and read.

1) Complete the following chart: Organ Function

Epiglottis

Esophagu s

Stomach

Small intestines

Large intestines

Pancreas

Gall bladder

Label the parts of the digestive system in the diagram below: