Human Lung Demonstration Model
Product Code : EL-HSM-10442
Quick answer: The Human Lung Demonstration Model is a working bell jar model in which two rubber balloons act as the lungs and a rubber sheet acts as the diaphragm. Pulling the diaphragm down inflates the balloons and pushing it in deflates them, showing the mechanics of breathing. Lab Exports manufactures it in Delhi for schools, colleges and universities.
Specifications
| Feature | Detail |
|---|---|
| Construction | Two rubber balloons, rubber stopper, bell jar |
| Diaphragm | Rubber, pulled down or pushed in |
| Size | 17 x 17 x 20 cm |
| Operation | Diaphragm pulled down: balloons inflate; pushed in: balloons collapse |
How the breathing demonstration is done
The bell jar stands for the chest cavity, the two balloons for the lungs and the rubber sheet at the base for the diaphragm, while the rubber stopper seals the top of the jar. The model shows that breathing is driven by changes in volume and pressure, not by the lungs drawing in air on their own.
- Hold the bell jar upright with the rubber diaphragm at the bottom.
- Pull the diaphragm down: the volume inside the jar increases, the pressure falls and air enters the balloons, which inflate.
- Push the diaphragm in: the volume decreases, the pressure rises and air is forced out of the balloons, which collapse.
- Repeat slowly, relating each movement to breathing in and breathing out.
This mirrors the body, where the diaphragm contracts and moves down during inhalation and relaxes upwards during exhalation. A good discussion point is the limit of the model: it has no rib cage, so it shows the role of the diaphragm but not the action of the intercostal muscles.
Key features
- Working model that students can operate themselves
- Two rubber balloons represent the lungs
- Rubber diaphragm pulled down and pushed in to show inhaling and exhaling
- Transparent bell jar keeps the balloons in view
- Compact size of 17 x 17 x 20 cm
Documentation and supply
Most Lab Exports products carry a one-year manufacturer warranty.
Lab Exports manufactures the Human Lung Demonstration Model at its works in Laxmi Nagar, Delhi, and supplies it to schools, colleges and universities in India and 60+ countries, handling the export documents for each shipment. More about the company is on the About Lab Exports page.
Related Human System Model products
- Human Transparent Lung Segment Model (EL-HSM-10441)
- Human Respiratory System Model (EL-HSM-10443)
- Human Lung Model (EL-HSM-10440)
- Functional Human Respiratory System Model (EL-HSM-10444)
- Human Lungs with Heart Model (EL-HSM-10439)
- Human Thoracic Organs Model (EL-HSM-10445)
The full range is in the Human System Model section of the Biology Lab range.
Frequently asked questions
How does the lung demonstration model work?
Pulling the rubber diaphragm down lowers the pressure in the bell jar so the balloons inflate; pushing it in raises the pressure so the balloons collapse.
What is the lung demonstration model made of?
Two rubber balloons, a rubber stopper and a bell jar with a rubber diaphragm. It measures 17 x 17 x 20 cm.
What is the price of the Human Lung Demonstration Model?
Prices are not published on the website. Add the Human Lung Demonstration Model to the Enquiry Cart with the Add To Cart button on this page, or email [email protected] with the house code EL-HSM-10442 and the quantity, to receive a quotation.
Does Lab Exports manufacture the Human Lung Demonstration Model?
Yes. Lab Exports manufactures the Human Lung Demonstration Model at its works at 11/315, Lalita Park, Laxmi Nagar, Delhi 110092, under house code EL-HSM-10442.
Request a quote
Email [email protected] with the house code EL-HSM-10442 and the quantity, or add the Human Lung Demonstration Model to the Enquiry Cart with the Add To Cart button on this page. Tender buyers can also see the Tenders and OEM page.
