PDF chapter test TRY NOW
Requirements:
1. Plastic bottle - 1
2. Balloons - 3
3. Y shaped tube - 1
4. Cork
Methodology of making:
1. Make a incision in the middle of the bottle.
2. Use some tools to make a hole in the cork and fix the one end of the Y shaped tube.
3. In the other end, fix the two balloons and put it inside the bottle.
4. At the bottom the bottle, cover with the 3rd balloon's half portion.
![shutterstock_1448058053.jpg](https://resources.cdn.yaclass.in/4811a2c7-8ef1-48be-8336-68c5d9e6f9db/shutterstock1448058053w400.jpg)
Making of lung model
Working methodology:
1. Hold the large, bottom balloon and pull it downwards slowly.
2. Observe the changes in the two balloons attached with the Y tube.
3. When, pulls down, both balloons inflate and deflate, due to pressure inside the bottle as like in your lungs.
![shutterstock_1448726591.jpg](https://resources.cdn.yaclass.in/2fe31c1f-58af-4350-a8da-5479fc1f2e39/shutterstock1448726591w400.jpg)
Exhalation and inhalation
Result:
Now we'll wrap up our bottle lung model by comparing it to our respiratory system and discussing the model's shortcomings.
Thoracic cavity | Bottle lung |
This cavity filled with pleural fluid | Bottle filled with air |
Trachea is flexible | Y-shaped tube is rigid |
Diaphragm flattens | Balloon drawn downwards |
Lungs made of alveoli | Balloons empty |
Ribs moves and changes the thoracic cavity volume | Bottle does not move |