Question

in the lung model what happens as you push up the balloon?

Answer 1

As the bottom balloon is pulled down, the volume increases and the pressure decreases. But, the pressures on the inside and outside of the bottle must balance. The only way to keep the pressure inside the bottle the same as the pressure outside of the bottle is to decrease the volume again. The only thing that can move to do that is the balloon on top, so it expands.

Answer 2

In the lung model when we push up the balloons which act as lungs in this model, they deflate and push out the air.

 The balloons deflate and push out all the air it could, or get smaller. It decreases the size of balloons whereas when the balloon was pulled low, the diaphragm contracts and moves down and the chest cavity expands.

 It increases the space and less pressure induces inside the lungs. Overall it represents the expansion and contraction of lungs.