Standard Science Primary 5 Systems

Which of the following shows the correct path of blood that is rich in carbon dioxide?

A Heart -> Body parts -> Lungs
B Body parts -> Heart -> Lungs
C Body parts -> Lungs -> Heart
D Lungs -> Heart -> Body parts
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Worked Solution

Step 1: Body cells use oxygen and produce carbon dioxide. Step 2: Deoxygenated (CO2-rich) blood returns to the heart. Step 3: The heart pumps this blood to the lungs to remove CO2 and gain oxygen.

Correct answer: Body parts -> Heart -> Lungs

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