Background

The respiratory system is one of the most fascinating and intricate structures of the human body. It is responsible for bringing into the body the oxygen needed for life, and for expelling carbon dioxide as a metabolic waste. It does so by means of a process called respiration, which involves the inhalation and exhalation of air and the exchange of gases that occurs within the lungs.

This system is composed of multiple parts, including the airway (nose, pharynx, larynx, trachea, bronchi, and bronchioles), lungs, and respiratory muscles. Each of these parts plays a crucial role in the overall process of respiration. The airway transports air from the atmosphere to the lungs, while the lungs are where the exchange of gases takes place. The respiratory muscles, such as the diaphragm, assist in moving air in and out of the body.

The biology of the respiratory system is both fascinating and complex, and the study of this system can provide us with a deeper understanding of how our bodies work and stay alive.

We know that respiration is key to the life and function of the human organism. But how does this knowledge translate into real-world scenarios? Well, the answer is vast: for instance, a better understanding of the respiratory system can help us to understand medical conditions like asthma, cystic fibrosis, and COVID-19.

Moreover, knowledge of the respiratory system has wide applications in the exercise and sports science disciplines. Athletes and coaches can utilize this knowledge to improve their aerobic performance, and to develop more efficient training strategies. In the same way, this knowledge can help us understand why it is important to practice regular exercise, and to follow a healthy lifestyle.

In order to further your understanding of the respiratory system and deepen your knowledge in the area, consider using these resources as well:

1. The Respiratory System | Khan Academy
2. Respiratory System - Innerbody
3. Human Respiratory System | Biology for Majors II
4. The Respiratory System | CliffsNotes
5. Textbook: Foundations of Anatomy & Physiology by Frederic H. Martini and Edwin F. Bartholomew.

Hands-on Activity

Activity Title: Simulating the Respiratory System

Overview:

The goal of this project is to help you understand and explore how the respiratory system functions, by way of creative, fun and hands-on learning: you and your group are tasked with creating a working model of the respiratory system, with the use of simple materials; and you will also research and discuss certain medical conditions which can affect the respiratory system, like asthma and COVID-19.

Project Description:

This project will be divided into two major parts. In the first part, you and your team will build a working model of the respiratory system. The model you build should not only illustrate the different parts of the system, but it should also show how air moves through the respiratory system during breathing.

In the second part of this project, you and your group will research a specific medical condition or disease which affects the respiratory system. You will explain what this condition is, how it affects the respiratory system, and how it is treated.

Materials:

• Balloons (various sizes)
• Drinking straws
• Empty clean 2 liter soda bottle
• Water displacement tube/hose (or transparent plastic tubing)
• Duct/masking tape
• Scissors

Building Instructions:

1. First, cut the plastic bottle in half. The lower half will represent the lung and the upper half will represent the trachea.
2. Inflate a balloon until it is approximately the size of the base of the bottle. This will be the lung.
3. Insert the balloon into the lower half of the bottle, and tape the balloon's neck into the lip of the bottle using duct/masking tape. Do this so that there is an airtight seal around the balloon's neck, but make sure the duct tape does not obstruct airflow.
4. Attach the opening of a balloon to one end of a water displacement tube or hose. The balloon will serve as the diaphragm.
5. Insert the tube/hose into the lower half of the bottle, through the neck of the bottle, and tape the hose into the bottle. Again, be sure that there is an airtight seal, but make sure that the duct tape is not obstructing the tube/hose.
6. Now, pulling down on the hose/tube (expanding the "diaphragm") should cause the "lung" to inflate. Similarly, pushing the tube/hose back up (contracting the "diaphragm") should cause the "lung" to deflate. Test to make sure your model works smoothly.

For part 2 of the project:

1. Select a medical condition or disease which affects the respiratory system to research. Some possibilities include but are not limited to: asthma, cystic fibrosis, emphysema, pneumonia, and COVID-19.
2. Research the selected medical condition, including: which parts of the respiratory system it affects; how it affects the function of the respiratory system; the condition's symptoms; treatments available; and so forth.
3. Prepare a presentation about your chosen respiratory condition to share with your class. Your presentation could take the form of a PowerPoint presentation, poster, video, or other format as you deem appropriate.

Deliverables:

1. A working model of the respiratory system. This model will be graded on the accuracy of the model, functionality of the model, and creativity.
2. A written report: The written report should include an introduction to the project topic, a detailed description of the building process and the science behind the working model. The report should then include a section on your selected respiratory condition, describing the condition, explaining how it affects the respiratory system, discussing available treatments, and so on. The report should conclude with statements summarizing what you learned through this project. Any sources consulted as part of your research must be cited in a bibliography at the end of your report.
3. Presentation: A presentation on the selected respiratory condition or disease. The presentation should be shared with the rest of the class, in the format decided by the group.

This project is to be carried out in teams of three to five people. It will take approximately 5-10 hours per student, spread out over the course of one month, to complete this project.