Standard Science Primary 5 Systems

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

A To exchange gases in the lungs.
B To transport digested food, oxygen, and waste products.
C To digest food into simpler substances.
D To pump oxygen to the heart.
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Worked Solution

Step 1: The blood acts as a transport medium. Step [2-9]: It carries nutrients from the small intestine and oxygen from the lungs to all cells. Step [2-9]: It also carries waste like CO2 away from cells.

Correct answer: To transport digested food, oxygen, and waste products.

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