Foundation Science Primary 5 Systems

Where does gas exchange take place in the human respiratory system?

A Windpipe
B Air sacs
C Heart
D Nose
Show Worked Solution

Worked Solution

Step 1: Air enters the lungs through the nose and windpipe. Step [2-9]: Oxygen enters the blood and carbon dioxide leaves the blood in the air sacs (alveoli).

Correct answer: Air sacs

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