what does each part of the constructed model represent

The constructed lung model usually represents the main parts of the breathing system: the lungs , the diaphragm , and the chest cavity. In a common classroom setup, the balloons represent the lungs, the rubber sheet or lower balloon represents the diaphragm, and the bottle or container represents the chest cavity.

What each part means

• Balloon at the top : the lungs.

• Rubber sheet or balloon at the bottom : the diaphragm.

• Plastic bottle or jar : the rib cage/chest cavity that holds the lungs.

How it works

When the bottom part is pulled down, the chest cavity volume increases and air enters the lungs, which models inhalation. When it is pushed up, the volume decreases and air leaves the lungs, which models exhalation.

If you want, I can also turn this into a one-sentence classroom answer or a labeled diagram explanation.