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.
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.
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 |
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