Standard Science Primary 5 Systems

What is the main function of the heart in the human circulatory system?

A To exchange gases.
B To protect the lungs.
C To pump blood to all parts of the body.
D To digest food.
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Worked Solution

Step 1: The heart is a muscular organ. Step 2: Its contraction and relaxation create the pressure needed to move blood through blood vessels.

Correct answer: To pump blood to all parts of the body.

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