The Human Body: Systems & Organs

SheelonBiologyScienceEnglishGrades 6-8Published May 25, 2026

Explore the amazing machine you live in. Test your knowledge of the heart, lungs, brain, and the body systems that keep you alive. Great for middle school.

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Questions in this quiz

All 8 shown. Answers not revealed.

Which organ pumps blood around the body?
Multiple Choice · 20s
AThe lungs
BThe heart
CThe liver
DThe brain
Which organ is mainly responsible for breathing?
Multiple Choice · 20s
AThe kidneys
BThe stomach
CThe lungs
DThe skin
What is the largest organ of the human body?
Multiple Choice · 20s
AThe skin
BThe liver
CThe heart
DThe brain
The brain is part of the nervous system.True / False · 20s
Adult humans have 106 bones in their body.True / False · 20s
Which body system breaks down food into nutrients?Multiple Choice · 20s
How many bones are in the adult human body? (write the number)Type Answer · 30s
What carries oxygen in your blood?Multiple Choice · 20s

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Questions in this quiz

Which organ pumps blood around the body?

Which organ is mainly responsible for breathing?

What is the largest organ of the human body?