Human Lung Model in Bell Jar
Product Code : LSK-HSM-10994
Human Lung Model in Bell Jar (SKU LSK-HSM-10994) is a working demonstration of breathing: two balloons on a Y-tube act as lungs inside an open-topped bell jar, and a stout rubber sheet across the base acts as the diaphragm. Pull the sheet down and the balloons fill; release it and they empty. It suits respiration lessons from middle school to Class 11. Science Lab Supplies manufactures the model at Plot 448, HSIIDC Industrial Area, Saha, Ambala, and supplies schools, colleges and stockists directly.
Specifications
The specifications of the bell jar breathing model are tabulated below. In short, the chest cavity is a bell jar with an open top, the lungs are two balloons joined to a Y-tube, and the diaphragm is a stout rubber sheet whose movement changes the pressure inside the jar.
| Specification | Value |
|---|---|
| SKU | LSK-HSM-10994 |
| Model type | Simple working model of lung function |
| Chest cavity | Bell jar with open top |
| Lungs | Two balloons |
| Airway | Y-tube carrying both balloons |
| Diaphragm | Stout rubber sheet |
| Inhalation shown | Diaphragm pulled down lowers pressure in the jar; balloons expand and take in air |
| Exhalation shown | Diaphragm released; balloons deflate |
| Manufacturer | Science Lab Supplies, Saha, Ambala, Haryana |
| Country of origin | India |
Applications and Experiments for the Bell Jar Lung Model
The model shows how contraction and relaxation of the diaphragm fill and empty the lungs. When the rubber sheet is pulled down, pressure inside the jar falls below atmospheric pressure and the balloons inflate; when it is released they deflate. It supports Class 7 and Class 10 science and NCERT Class 11 Breathing and Exchange of Gases.
- Class 7 and Class 10 science: breathing in and breathing out as part of respiration and life processes.
- Class 11 biology: the mechanism of breathing and the role of the diaphragm and pressure changes.
- Comparing inhaled and exhaled air afterwards with the Respiration Apparatus.
- Extension work on lung volumes and air flow using the Lung Capacity Meter.
Standard Scope of Supply
Each unit consists of an open-topped bell jar forming the chest cavity, two balloons attached to a Y-tube representing the lungs, and a stout rubber sheet acting as the diaphragm. Other respiratory system models, charts or apparatus can be priced on the same quotation if a department needs them.
Packing, MOQ and Lead Time
You can request a quote for one demonstration model or for several so each class section has its own. The quotation from Science Lab Supplies confirms packing, delivery time and price for the requested quantity, and other school biology lab equipment can be added to the same document.
As an Importer-Exporter Code holder, Science Lab Supplies is able to ship to buyers in Sri Lanka, Vietnam, Malaysia, Peru, Egypt and Iraq. Get in touch through our contact page, line up several items in the enquiry cart, or visit the lab tender page for tender-based purchasing.
Frequently Asked Questions
How does the bell jar model show breathing?
Pulling the rubber diaphragm downward lowers the pressure inside the jar, so the two balloons expand and take in air through the Y-tube. Releasing the sheet lets the balloons deflate, imitating breathing out.
What represents each part of the respiratory system?
The bell jar is the chest cavity, the two balloons are the lungs, the Y-tube stands for the trachea branching into the bronchi, and the stout rubber sheet at the base is the diaphragm.
Is the bell jar lung model made in-house?
Yes. Science Lab Supplies manufactures the model at its works in Saha, Ambala, India, and its quotation comes from the factory office rather than from an outside agent.
Can it be ordered with anatomical lung models?
Yes. Detailed anatomical lung and respiratory system models from the Human System Model range can be quoted with it, so students see both how breathing works and what the real organs look like.
Related Lung and Respiratory Models
These respiratory models build on the bell jar demonstration, from other balloon-and-jar versions to detailed anatomical lungs, alveoli and a powered rib-cage model. Grouped with this model on one quotation, they let a teacher move from how breathing works to where it happens in the body.
- Human Lung Demonstration Model — two rubber balloons, rubber stopper and bell jar, 17 x 17 x 20 cm.
- Lung Model Demo Kit — bell jar, single-hole bung, Y adapter, balloons and latex sheet to assemble.
- Human Lung Model — two-part model showing bronchioles connecting to alveolar ducts.
- Human Respiratory System Model — nasal cavity, bronchial tree, lungs and position of the heart on a base.
- Functional Human Respiratory System Model — powered, life-size model with a moving rib cage.
- Magnified Pulmonary Alveoli Model — alveolar sac, alveolar duct and capillary network, 26 x 15 x 35 cm.
- Human Transparent Lung Segment Model — transparent lungs showing 10 right and 8 left segments.
Browse the full Human System Model range, the General Biology Products range for respirometers, or all Biology Lab products.
Last updated: 9 October 2026
