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Human body quiz for kids
Your body is amazing. How well do you know it?
10 multiple-choice questions, with the answer explained after each one.
Answer each question, see why, and beat your best score.
All 10 questions and answers
Want to check an answer or run the quiz out loud? Every question is here, with the answer hidden until you open it.
- How many bones are in an adult human body?
- 306
- 156
- 106
- 206
Show answer
206. Babies are born with more, and some fuse as they grow.
- What is the largest organ of the body?
- Skin
- Liver
- Heart
- Brain
Show answer
Skin. Skin protects everything inside.
- How many chambers does the human heart have?
- 3
- 2
- 6
- 4
Show answer
4. Two atria and two ventricles.
- What is the longest bone in the body?
- Femur (thigh bone)
- Tibia
- Spine
- Humerus
Show answer
Femur (thigh bone). The femur runs from the hip to the knee.
- Where is the smallest bone in the body?
- In the ear
- In the nose
- In the toe
- In the finger
Show answer
In the ear. The stapes is about 3 mm long.
- What do red blood cells carry around the body?
- Germs
- Oxygen
- Food only
- Bones
Show answer
Oxygen. They pick up oxygen in the lungs.
- What is the hardest substance in the body?
- Bone
- Tooth enamel
- Fingernail
- Hair
Show answer
Tooth enamel. Enamel covers your teeth.
- How many teeth does an adult usually have?
- 20
- 40
- 32
- 28
Show answer
32. Children have 20 baby teeth.
- Which organ helps you breathe?
- Kidneys
- Stomach
- Liver
- Lungs
Show answer
Lungs. Lungs take in oxygen and breathe out carbon dioxide.
- Which organ controls the whole body?
- Stomach
- Brain
- Lungs
- Heart
Show answer
Brain. The brain sends messages along nerves.
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