over 270 bones
About how many bones does a newborn baby have before some fuse together?
As infants grow, many of these bones gradually fuse, bringing the adult total down to 206.
Source: Wikipedia, Skeleton (2024) en.wikipedia.org
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How well do you know the human body?
Guess the real numbers behind the human body, see how everyone else guessed, and get the source.
Guess the statOne tap · see how everyone guessed
What is the average height of an adult U.S. man, according to CDC measurements?
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Today's round
- 4 stats to guess
- 1 opinion poll
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Body by the numbers
Real figures with their sources. All Body facts →
about 30 trillion cells
About how many cells make up an adult human body?
The body is also estimated to host roughly 38 trillion bacteria, meaning microbial cells actually outnumber human ones.
Source: Wikipedia, Human body (2024) en.wikipedia.org
about 150 quarts (170 liters)
About how many quarts of blood do the kidneys filter each day?
Almost all of that filtered fluid is reabsorbed into the bloodstream; only 1 to 2 quarts leave the body daily as urine.
Source: Wikipedia, Human body (2024) en.wikipedia.org
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Questions
How does BodySurvey.com work?
Each question asks you to guess a real number about the human body. After you answer you see how everyone else guessed, then the real figure and where it comes from.
How is the daily round scored?
Four stats and one opinion poll. A correct guess earns 100 points plus up to 50 for speed, with a combo bonus for answers in a row. The range next to the right answer earns 40. Opinion polls earn 25 for having your say, and nailing every stat adds 150.
Where do the numbers come from?
Every stat links to its source, such as government statistics agencies, research organizations and industry groups. Figures are checked against the source before they go live.
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