Class 10 Zoology simulations · Life Processes

Mechanism of breathing (bell-jar model)

Pull the rubber diaphragm down: the volume of the jar increases, pressure falls and the balloons (lungs) inflate.

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What to notice

Inspiration happens when intra-pulmonary pressure falls below atmospheric pressure.

Key relation

Boyle’s law: P ∝ 1/V at constant temperature

Try this

Pull the diaphragm further. How does the pressure change?

What you can change

• Diaphragm pull (depth when automatic): 0 to 100 %
• Breathe automatically: choose Yes, No — use the slider

More in Life Processes

• The cardiac cycle
• Double circulation
• Temperature and pH affect enzymes
• Limiting factors of photosynthesis
• Nephron: filtration and reabsorption
• ATP balance sheet of respiration
• Stomata: guard cells at work

See all Class 10 Zoology simulations or every Physica simulation.