Quick Answer:The Lung Demonstration Model shows how breathing works, using two sacs as the lungs, a rubber membrane as the diaphragm and a clear plastic enclosure as the chest cavity. It measures 30 cm high by 14.5 cm wide.
Last updated: 19 October 2026
Key Features
Two sacs represent the lungs.
A rubber membrane serves as the diaphragm.
A clear plastic enclosure models the chest cavity.
Size: 30 cm high x 14.5 cm wide.
Technical Specifications
Specification
Value
Lungs
Two sacs
Diaphragm
Rubber membrane
Chest cavity
Clear plastic enclosure
Height
30 cm
Width
14.5 cm
How It Is Used
Pulling the rubber diaphragm down and letting it return makes the two sacs fill with air and then empty, so students see directly how contraction and relaxation of the diaphragm drive breathing.
Frequently Asked Questions
How does the Lung Demonstration Model show breathing?
When the rubber diaphragm is made to contract and relax, the two sacs representing the lungs fill with air and empty, giving a firsthand view of how the lungs work.
