Question 1 of 10
How many bones does an adult body have?
How this quiz works
There are 10 questions about the human body, from the easiest to the hardest. Choose an answer to continue: the correct answer appears at the top of the next page, and the explanation follows just below.
Count the points yourself, 1 for each correct answer, and see on the last page which range your round fell into. There is nothing to fill in or install.
The questions cover bones, organs, blood, senses and genetics. The content is informational and does not replace medical advice.
The questions range from the best known, such as the number of bones, to ones that catch even those who studied biology at school.
A body that works nonstop
While you read this page, the heart beats, the lungs exchange air, the liver processes nutrients and millions of cells are replaced, all without you having to think about it.
Much of this work is coordinated by the autonomic nervous system, which adjusts breathing, heartbeat and digestion according to what the body is doing, from sleep to a run.
Many of these functions follow an internal clock of about 24 hours, the circadian rhythm, which influences sleep, hunger and even body temperature throughout the day.
