Standard Science Primary 5 Systems

Which of the following correctly describes the flow of blood that is rich in carbon dioxide?

A Rest of body to Heart
B Lungs to Heart
C Heart to Rest of body
D Heart to Lungs
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Worked Solution

Step 1: Body cells use oxygen and produce carbon dioxide. Step 2: This CO2-rich blood travels back to the heart. Step 3: The heart then pumps it to the lungs to remove CO2. Step 4: The specific flow for CO2-rich blood returning for processing is body to heart.

Correct answer: Rest of body to Heart

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