Standard Science Primary 5 Systems

What happens to our ribcage when we breathe out?

A Moves upwards and outwards
B Stays in the same position
C Moves downwards and inwards
D Expands to let more air in
Show Worked Solution

Worked Solution

Step 1: Breathing out involves air leaving the lungs. Step 2: The chest cavity must become smaller to push air out. Step 3: The ribcage moves down and in to achieve this.

Correct answer: Moves downwards and inwards

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