Standard Science Primary 5 Systems

Which of the following is NOT part of the human circulatory system?

A Blood
B Lungs
C Heart
D Blood vessels
Show Worked Solution

Worked Solution

Step 1: The circulatory system consists of the heart, blood vessels, and blood. Step 2: Lungs belong to the respiratory system. Step 3: While they work together, lungs are structurally separate.

Correct answer: Lungs

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