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Human Body Basics

You've lived inside one your whole life, but how well do you actually know the machine? Twenty questions on bones, blood and breathing.

🔬 Science easy 20 questions ~7 min

What this quiz asks

Which organ is the largest in the human body?
How many chambers does a healthy human heart have?
An adult human skeleton usually contains 206 bones.
Which blood vessels carry blood away from the heart?
Where are most nutrients from food absorbed?
Which is the smallest bone in the human body?
Select ALL of these that are part of the respiratory system.
Which protein in red blood cells carries oxygen around the body?
Which organ produces the hormone insulin?
Which muscle does most of the work of breathing?
Which organs filter the blood to make urine?
Which is the longest bone in the human body?
Which part of the eye controls how much light gets in?
How many teeth does a full adult set contain, wisdom teeth included?
Select ALL of these that are part of the digestive system.
Select ALL of these bones that are found in the arm or hand.
The human body contains more muscles than bones.
Your hair and your fingernails are made mostly of the same protein.
Does blood returning from the lungs enter the left side of the heart?
Which part of the brain handles balance and coordination?