Standard Science Primary 5 Systems

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

A From all parts of the body to the heart
B From the heart to the lungs
C From the lungs to the heart
D From the heart to the lungs and then to the body
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Worked Solution

Step 1: Oxygen enters the blood in the lungs. Step 2: This oxygen-rich blood must return to the heart to be pumped to the rest of the body. Step 3: Therefore, the path from the lungs to the heart is oxygen-rich.

Correct answer: From the lungs to the heart

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