Objective
To construct a working model of human lungs using simple materials, helping students understand the mechanics of breathing and the function of the lungs in the respiratory system.
Scientific interpretation
This project demonstrates how the lungs work to inhale and exhale air. The balloons represent the lungs, the straw acts as the trachea, and the plastic bottle simulates the chest cavity. When the base of the bottle (chest cavity) is manipulated, it changes the air pressure inside, causing the balloons (lungs) to inflate and deflate. This model helps visualize how the diaphragm works in our bodies to help us breathe.
Material Required
| Sr No. | Item Name | Quantity |
| 1 | Red balloons | 3 |
| 2 | Air Clay | 1 |
| 3 | Straws | 3 |
| 4 | Plastic Bottle (large enough to accommodate the balloons, sourced from home) | 1 |
| 5 | Paper Tape | 1 |
