Model for Demonstrating Human Lung Function

Human Lung Function Demonstration Model – Breathing Mechanics (Lungs & Diaphragm)

An educational model illustrating the mechanism of pulmonary respiration in humans. 

This educational lung function demonstration model provides a clear, hands-on explanation of how breathing works and how the diaphragm drives airflow into and out of the lungs. The model is a simple but highly effective teaching apparatus consisting of two elastic sacs representing the lungs, a flexible rubber membrane acting as the diaphragm, and a transparent plastic chamber modelling the chest cavity.

To demonstrate inhalation and exhalation, pull the lower rubber membrane to simulate diaphragm movement. As the “diaphragm” moves, learners can directly observe how changes in chest cavity volume cause the lungs to inflate and deflate, illustrating the basic mechanics of ventilation.

How to use the model: 

This teaching aid consists of a transparent bell jar with two balloons suspended inside, attached to a connector shaped like an inverted Y. The bell jar is mounted to a base with a built-in membrane with a handle. By pulling and filling the membrane and releasing it, we demonstrate and explain the mechanism of inhalation and exhalation, and the expansion of the chest and lungs as air flows into the lungs.

Made from durable rubber and sturdy plastic, the model is designed for classroom use.

Height: approx. 33 cm.