Term

Describe the mechanism for breathing in and out.

Definition

In = muscles contract, chest expands, pressure drops Out = muscles relax, chest shrinks, pressure rises

Term

Explain pressure changes and how they help us breathe.

Definition

In - Bigger space → lower pressure → air rushes in Out - Smaller space → higher pressure → air pushed out

Term

Q1. What part of the bell jar model represents the diaphragm? Q2. Give one strength of the bell jar model. Q3. Give one weakness of the bell jar model. Q5. Explain one reason why the bell jar model does NOT perfectly represent human breathing.

Definition

1. The flat sheet 2. it shows how when the diagram goes down the lungs expand 3. The diaphragm is dome shaped not a flat sheet 5. it doesn't show how the intercostal muscles work