Lesson 7

Lesson Objectives...

• Develop a model based on multiple lines of evidence to represent the inputs, processes, and outputs of the digestive system and the role that the system, and the subsystems within it, play in breaking down matter inputs through chemical reactions, absorbing food, and excreting unused matter. 

• Respectively provide and receive critiques about small-group models developed to explain how various subsystems in a healthy digestive system interact to move food through a series of chemical reactions to break down large food molecules. 

• Engage in an argument from evidence to eliminate two of the five possible gastrointestinal conditions that could be causing the symptoms that M’Kenna is experiencing in her digestive system, based upon how they affect the body as a whole system.

Resources for Lesson 7...

Gotta-Have-It Checklist...

The list below is what we figured out in each lesson.

Class Consensus Model

This is our class model to answer "How does a healthy digestive system work?

What we figured out this lesson...

• In a healthy digestive system, multiple subsystems, or organs, work together to help the body break large food molecules down into smaller food molecules.

• Large food molecules are broken down into smaller food molecules through chemical reactions that occur in the mouth, stomach, and small intestine.

• Each organ plays a different role in the breakdown of large food molecules.

• In a healthy person, the small intestine absorbs the small food molecules that had been broken down in preceding organs in the digestive system.