Primary Facilitator
Dr. Nickie Cauthen, Assistant Professor of Biology, Clayton College and State University

Secondary Facilitator
Dr. C. Blaine Carpenter, Professor of Biology, Clayton College and State University

Each lesson consists of 10 activities.   We suggest that you proceed through the lesson in the order that the activities are presented.  Should you NOT complete a particular activity, remember to go back to it as soon as you can.

Send Dr. Cauthen an E-mail as soon as you know you have a question... or you may put a message on the Bulletin Board on WebCT.  If you need help with WebCT, you can get a tour at:

WebCT Student Guide which is located at http://learningcenter.clayton.edu/fidl/onlinetr/student_webct/studentwebct/webct/webct_table_content.htm
 

INDEX  OF  ACTIVITIES

• Introduction
• Objectives
• Key Terms
• Text Pages
• Interactive Study Partner--CD-ROM
• Cycles of Life Video
• Tutorial
• Web Links and Web Exercises
• Study Guide and Practice Tests
• Assignments

I. Introduction to Lesson 9  
 

In this our final stretch in our biology course, we are going to study several "organ-systems" in animals.  Our purpose is to understand how animal systems provide solutions for many of the challenges for survival of life on earth.  One of the most obvious needs for survival is fuel.  As our cars will not run without fuel, neither will we.  We have learned that plants can make their own fuel by converting the light energy from the sun into carbohydrates during photosynthesis.  Alas, we animals cannot achieve this feat, and must eat food and drink liquids to acquire nutrients.

To extract the needed nutrients and deliver them to the cells, animals and other complex organisms have developed sophisticated mechanisms to ingest and break down foods into metabolically useful constituents. This is the process of digestion, which culminates in the absorption of those nutrients needed most by the cells. While the digestive systems of higher life forms involve a variety of organs and tissues, they are essentially a series of food processors dedicated to the progressive mechanical and chemical decomposition of food.

II. Objectives

Click here to review the objectives for Lesson 9. This is a VERY important step, as we let you know in the objectives exactly what you need to know.

III. Key Terms

Familiarize yourself with the key terms below.  They are used in the text, the tutorial, the Interactive Concepts, and the Cycles of Life Video.
 

incomplete digestive system	gizzard	epiglottis	jejunum
complete digestive system	herbivore	esophagus	ileum
secretion	lumen	sphincter	pancreas
digestion	oral cavity	stomach	liver
absorption	tooth	chyme	gallbladder
elimination	bolus	peristalsis	emulsification
omnivore	pharynx	duodenum	mucosa
villi	suspension feeder	segmentation	rectum
carnivore	large intestine (colon)	cecum (appendix)	bulk feeders
anus	vitamins	substrate feeder

IV. Text Pages 

Read Chapter 21, Nutrition and Digestion  in Biology, Concepts and Connections by Campbell, Mitchell, and Reece.

V. Interactive Study Partner CD-Rom 

Put your Interactive Study Partner CD-Rom into the CD player on your computer.

• Proceed to Activities
• Choose Chapter 21
• Choose 21A, Digestive System Function
• Complete ALL exercises
• Take the quiz.
• Record your results on the quiz in your journal and review the items that you missed on the CD-ROM, in the tutorial, or in the textbook.

Watch Video Lesson 20 - Animals: Digestion and Fluid Balance.  The video is about 28 minutes in length but for this lesson we are only focusing on the portions of this video that deal with the digestive system.

Click here for a viewing guide for the video. Answer the questions in the viewing guide before proceeding.

VII. Tutorials  

Click on the tutorial button to guide you with the concepts.  I wrote the tutorials for you, and it will hopefully reinforce important points and clarify some of the concepts.

  Lesson 9 Tutorial for Nutrition and Digestion

You should save the tutorials to your hard drive.  You can then view the file in PowerPoint and print them out if you wish.

VIII. Web Links and Web Exercises 

To refine your studies you will need to go to the Internet (WWW), and work with more sources.  Proceed to the following.

• Read the summary of Chapter 21 from the Campbell Web Site
• On-Line Biology Book: The Digestive System .. this is really helpful
• Learn about fast foods... look up the places you frequent.  Then type in a food and look at the calories and fat grams of your favorites!
• Online human anatomy at the "innerbody"
• Click on the button below to go to the Biology Place on the Internet.

   Click here!

• Type in Chapter 21, and look over the Biology News and any Web sites of interest.
• In the left column, select "WebQuests."
• Then select "PizzaQuest: Biomolecules."
 
• Complete the PizzaQuest: Biomolecules Online Worksheet
• DO NOT SEND THIS REPORT TO Dr. Cauthen.
• While completing the exercise, keep the following objectives in mind.
• To interpret nutritional data from a food label
• To make simple calculations based upon information provided in food charts
• To understand that food is composed of biological molecules that are important for nutrition
• Complete the entire worksheet.

Study Guides and Practice Tests enable you to assess yourself and your progress.

• Now, get out your printed Study Guide
• Work through all the Chapter 21 activities.
• Take the practice quiz on the Campbell Web site
• Review the CD-ROM quiz.