Lesson 13

How does a healthy body use food for energy and growth, and how is M'Kenna's body functioning differently?

Lesson Objectives...

Develop models of three possible pathways showing how food is rearranged in the body to create energy, store matter for later use, and use matter for growth within a body system.
Construct an explanation to explain the relationships between differences in M'Kenna's digestive system and a healthy digestive system in order to predict symptoms (effects), such as M'Kenna's decreased growth rate.

Lesson 13 - Science Notebook - For Online

MR - Lesson 13 - Slides

Slide Presentation for Lesson 13...

This is the slide presentation used by your teachers when navigating through Lesson 13.

The digestive system takes in food and breaks it down through chemical reactions, and the small food molecules get absorbed into the body’s circulatory system through the small intestine.
The respiratory and circulatory systems work together to bring food molecules and oxygen to cells in the body and to remove carbon dioxide.

Some organs in the respiratory system that work together include the following: nose, mouth, and lungs.
Some organs in the circulatory system that work together include the following: blood and heart.

The blood moves food molecules to cells (optional).
The blood brings oxygen to cells from the respiratory system (optional).
The blood removes carbon dioxide and water from cells through the respiratory system (optional).

Humans need to take in food. Food is a type of fuel, which means that it can react with other substances to release energy.
Cells rearrange food and oxygen through a chemical reaction, which creates carbon dioxide and water and releases energy that cells can use.
The body system’s inputs are food (molecules mainly with C,H,O’s) and oxygen. The outputs are mainly carbon dioxide, water, and energy (students might also include poop, which is mostly fiber and water).

MR - Lesson 13 - Who is M’Kenna, and what happened to her?

The digestive system takes in food and breaks it down through chemical reactions, and the small food molecules get absorbed into the body's circulatory system through the small intestine.
The respiratory and circulatory systems work together to bring food molecules and oxygen to cells in the body and to remove carbon dioxide.
Humans need to take in food. Food is a type of fuel, which means that it can react with other substances to release energy.
Cells rearrange food and oxygen through a chemical reaction, which creates carbon dioxide and water and releases energy that cells can use.
The body system's inputs are food (molecules mainly with C, H, O's) and oxygen. Outputs are mainly carbon dioxide, water, and energy.
When the body takes in excess food, it can be stored for later use in the form of fat molecules in the body.
When the body doesn't take in enough food, it can use the stored fat or food molecules dedicated for growth to burn as fuel. Most of the matter goes into the air when fat is burned.
M'Kenna's body used fat molecules stored in matter from food.
M'Kenna is absorbing less food through her small intestine, so the cells in all the tissues in her body aren't getting enough energy, which is causing her non-digestive system issues.

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