Standard Science Primary 5 Systems

At which part of the respiratory system does the exchange of gases take place?

A Air sacs in the lungs
B Heart
C Windpipe
D Nose
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Worked Solution

Step 1: Gaseous exchange requires a thin surface and proximity to blood vessels. Step 2: This occurs in the tiny air sacs (alveoli) inside the lungs.

Correct answer: Air sacs in the lungs

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