During inspiration, the diaphragm contracts and flattens, increasing chest volume and reducing pressure, which allows air to enter the lungs.
During inspiration, the diaphragm contracts and flattens, increasing chest volume and reducing pressure, which allows air to enter the lungs.
| Front | Describe the part played by the diaphragm in causing air to enter the lungs during breathing. (3 marks) |
|---|---|
| Back | Diaphragm (muscle) contracts; Flattens / Increases volume of chest; Reduced pressure allows air to enter; |
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