Breathing Mechanism | Lungs Working Model | Model of Respiratory System | School Science Project

welcome to Trisha and Kavyas diary.
In this video will make Lungs Working Model for School Science Project, very easy to make.

For this experiment
you will need drinking straw, Plastic bottle and balloon.


The lungs serve as the respiratory organs for humans and many other animals. They extract oxygen from the air and transfer it to the bloodstream. They also expel carbon dioxide.

In this experiment, the balloons on the straws act as the lungs.
the straws act as the trachea.
the bottle serves as the chest.
the balloon at the bottom of the bottle is the diaphragm.

When the diaphragm is pulled, the pressure in the bottle becomes lower than atmospheric pressure, and the balloon “lungs” inflate.
When the diaphragm is pressed, the processes reverse.

lungs work similarly: when the diaphragm contracts, the volume of the chest cavity increases and air fills the lungs.