Standard Science Primary 5 Systems

In the human body, which organ is responsible for removing carbon dioxide from the blood and enriching it with oxygen?

A Small Intestine
B Heart
C Lungs
D Kidneys
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Worked Solution

Step 1: Blood rich in carbon dioxide is pumped to the lungs. Step 2: In the lungs, carbon dioxide is exhaled and oxygen is absorbed into the blood. Step 3: The enriched blood then returns to the heart to be pumped to the rest of the body.

Correct answer: Lungs

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