Standard Science Primary 5 Systems

What is the role of the heart in the human circulatory system?

A To exchange gases with the environment.
B To pump blood to all parts of the body.
C To produce new blood cells.
D To digest food and absorb nutrients.
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Worked Solution

Step 1: The circulatory system transports oxygen and nutrients. Step 2: The heart is a muscular organ. Step 3: It acts as a pump to keep blood moving through the blood vessels.

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

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