Standard Science Primary 5 Systems

Which of the following correctly describes the movement of oxygen in the human body?

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

Step 1: Oxygen enters the lungs via inhalation. Step 2: It enters the bloodstream and travels to the heart. Step 3: The heart pumps oxygen-rich blood to all parts of the body.

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

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