QUESTION 1 / 20 · SKELETON & MUSCLESEasy
How many bones does a typical adult human skeleton have?
LIVE BODY COUNTER · ON THIS PAGE FOR 0:00
What your body has been doing
What this human body quiz covers, in short
Twenty multiple-choice questions on anatomy and physiology, four in each of five areas: the skeleton and muscles, the heart and blood, the brain and nerves, organs and digestion, and the senses and cells.
This is a knowledge quiz, not medical advice. Figures are typical adult values; real bodies vary. The quiz is our own and not normed.
By What's Your IQ · Reviewed 4 Oct 2026- Format
- 20 multiple-choice questions, 4 options each
- Systems
- Skeleton and muscles, heart and blood, brain and nerves, organs, senses and cells
- Bonus
- Live body counter: now, a day, a lifetime
- Level
- Roughly secondary-school biology
2% → 20%the brain's share of body weight, and of the body's energyAt rest, your brain burns about a fifth of your energy, even when you're not thinking hard.3
1543The body mapped.Andreas Vesalius's De humani corporis fabrica corrected centuries of errors by drawing from real dissections.
1628Blood circulates.William Harvey showed the heart pumps blood around a closed loop, rather than the liver making it fresh.
1901Blood groups.Karl Landsteiner discovered the A, B and O groups, which made safe blood transfusions possible.
2003The genome read.The Human Genome Project finished a near-complete sequence of human DNA.
- Harvey, W. (1628). Exercitatio anatomica de motu cordis et sanguinis in animalibus. Frankfurt.
- Landsteiner, K. (1901). Über Agglutinationserscheinungen normalen menschlichen Blutes. Wiener klinische Wochenschrift, 14, 1132–1134.
- Raichle, M. E., & Gusnard, D. A. (2002). Appraising the brain's energy budget. PNAS, 99(16), 10237–10239.