Standard Science Primary 5 Systems

Which of the following correctly shows the flow of blood that is RICH in carbon dioxide?

A Lungs -> Rest of the body -> Heart
B Lungs -> Heart -> Rest of the body
C Heart -> Lungs -> Heart
D Rest of the body -> Heart -> Lungs
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Worked Solution

Step 1: Body parts use oxygen and produce carbon dioxide. Step 2: This carbon dioxide-rich blood travels back to the heart. Step 3: The heart pumps it to the lungs to remove carbon dioxide and pick up oxygen.

Correct answer: Rest of the body -> Heart -> Lungs

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