Human Lung Demonstration Model
Product Code : LSK-HSM-10944
Human Lung Demonstration Model (SKU LSK-HSM-10944) is a working bell-jar model in which two rubber balloons act as lungs and a thin rubber sheet acts as the diaphragm, so pulling and pushing the sheet makes the balloons fill and collapse. It suits primary and middle-school science, Class 10–11 biology and introductory physiology lessons. Science Lab Supplies manufactures the model in Saha, Ambala, India, at Plot 448, HSIIDC Industrial Area, and quotes it directly to schools, colleges, distributors and contractors handling tenders.
Specifications
The bell-jar breathing model is specified in full in the table below. In short, two rubber balloons hang from a rubber stopper inside a transparent bell jar closed at the bottom by a thin rubber diaphragm, and the whole unit measures 17 x 17 x 20 cm.
| Specification | Value |
|---|---|
| SKU | LSK-HSM-10944 |
| Size | 17 x 17 x 20 cm |
| Chest cavity | Bell jar, transparent |
| Lungs | 2 rubber balloons |
| Closure | Rubber stopper |
| Diaphragm | Thin rubber diaphragm at the bottom of the jar |
| Inhaling demonstration | Diaphragm pulled down, balloons inflate |
| Exhaling demonstration | Diaphragm pushed in, balloons collapse |
| Manufacturer | Science Lab Supplies, Saha, Ambala, Haryana |
| Country of origin | India |
Applications and Experiments for the Lung Demonstration Model
The model shows why air enters and leaves the lungs: lowering the diaphragm enlarges the space in the jar, the pressure falls and the balloons inflate; pushing it back up reverses the effect. With it, students can demonstrate breathing for themselves, making it handy biology lab equipment in India for school classrooms.
- Primary and middle-school science: showing inhaling and exhaling with the diaphragm.
- NCERT Class 10 Life Processes and Class 11 Breathing and Exchange of Gases: linking diaphragm movement to pressure and volume changes in the chest.
- Following the demonstration with real exhaled air collected in Lung Volume Bags, Plastic Transparent.
- Moving from the balloon lungs to real airway anatomy on the Human Transparent Lung Segment Model.
Pull the rubber diaphragm gently and evenly; overstretching it can tear the sheet.
Standard Scope of Supply
One Human Lung Demonstration Model is supplied, consisting of the bell jar, a rubber stopper carrying two rubber balloons, and the thin rubber diaphragm across the bottom of the jar, making a working unit of 17 x 17 x 20 cm. Additional respiration apparatus can be added to the same quotation.
Packing, MOQ and Lead Time
Order quantities are flexible: one demonstration model for a teacher's desk or one for each student group. Each quotation spells out packing, delivery time and price for the number requested, and further school biology models can be included on it.
Science Lab Supplies holds an Importer-Exporter Code and can ship to buyers in Nepal, Bangladesh, Zambia, Rwanda, South Africa and Qatar. The business is registered under Udyam as a manufacturing enterprise (UDYAM-HR-01-0014546) and for GST (GSTIN 06ADEPJ0574F2ZU). Price requests go through the contact page or the enquiry cart, while public-sector buyers will find bid details on the lab tender page.
Frequently Asked Questions
How does the Human Lung Demonstration Model work?
Pulling the thin rubber diaphragm at the bottom of the bell jar downwards makes the two balloons inflate, imitating inhaling. Pushing it in makes the balloons collapse, imitating exhaling.
What is it made of?
It is constructed of two rubber balloons, a rubber stopper and a bell jar, with a thin rubber diaphragm at the base. The jar is transparent, so the balloons stay visible throughout the demonstration.
Is Science Lab Supplies the manufacturer or a trader?
Science Lab Supplies manufactures the model itself in Saha, Ambala, India. Buyers deal with the producer from the first price request to dispatch, with no distributor margin added on the way.
How big is the model?
The model measures 17 x 17 x 20 cm, a size that suits a front-of-class demonstration or group work on a laboratory bench.
Related Breathing Demonstration Apparatus
These items demonstrate breathing mechanics, test exhaled air or measure respiration, so they extend a bell-jar lesson into practical work on gases and lungs. Any of them can be quoted together with this model for one respiration bench.
- Human Lung Model in Bell Jar — two balloons on a Y-tube in an open-top bell jar with a stout rubber sheet.
- Lung Model Demo Kit — bell jar, single-hole bung, Y adapter, balloons, cable ties and latex sheet as a kit.
- Kit for Experiments with Breathing — lung model with lime water to reveal carbon dioxide in exhaled air.
- Functional Human Respiratory System Model — life-size model showing respiration through rib cage movement.
- Human Lungs With Heart Model — coloured model on a base showing the position of the diaphragm.
- Respirometer — two stoppered boiling tubes linked by three-way taps to a graduated manometer.
- Bell Jars — glass bell jar on a baseplate with tap, for vacuum demonstrations.
Browse the full Human System Model range, the General Biology Products range for respiration apparatus, or all Biology Lab equipment.
Last updated: 9 October 2026
