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Doubt It!

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human body trivia questions for a party game

Human Body Questions for Doubt It!

The Human Body topic has 50 questions with one thing in common: each one asks for a fixed anatomical number, bones, teeth, vertebrae, chromosomes, never an average that shifts with the sample, making it a solid base for a round of Doubt It! without requiring anyone at the table to have a medical degree.

Why anatomy makes for such good bluffing

  • Most of the topic's 50 questions carry weight 2, counts almost everyone has vaguely heard, like the adult skeleton's 206 bones or the 32 permanent teeth, but rarely remembers precisely enough to bluff with confidence. The rarer weight-3 ones force a longer guessing escalation: how many ossicles make up the middle ear across both sides (6), or how many tarsal bones sit inside a single foot (7).
  • 8 of the topic's 50 questions are not about typical anatomy, but about Guinness records tied to the human body: American Jon Brower Minnoch, with an estimated 1978 peak of 635 kg, and student Randy Gardner, who stayed awake for 264 straight hours in a 1964 experiment monitored by Stanford. That kind of question changes the bluffing logic: instead of estimating a fixed biological fact, the group tries to recall one specific historical figure.
  • As in any topic in the game, each round opens a fan of 4 candidate questions, drawn from the match's shuffled deck, and whoever's turn it is picks one of them to play; the other three go back to the discard pile. The game engine interleaves questions by subject and by unit of measurement so that two "how many bones" questions do not land in the same fan back to back.

Two real questions from the Human Body bank

Weight-2 question, a familiar count

Input
Quantos ossos tem o esqueleto de um ser humano adulto?
Expected output
206

A newborn has around 300 bones, and many fuse together during growth until only 206 remain, the extra fact revealed after the answer.

Weight-3 question, a historical record

Input
Em 2014, o indiano Vijay Kumar foi reconhecido pelo Guinness por ter quantos dentes na boca, o maior número já registrado?
Expected output
37

That is 5 more than the normal 32 permanent teeth of an adult, due to supernumerary teeth, exactly the kind of obscure fact that separates who knows from who is just guessing.

Weight-2 question, a fixed measurement

Input
Quantos litros de sangue circulam, em média, no corpo de um adulto?
Expected output
5

Donating one blood bag, about half a liter, removes only a small fraction of that total, which helps calibrate nearby guesses around 5.

Full game FAQ

At the start of each round, 4 questions are drawn from the deck and shown to whoever is about to give the first guess. That player picks one to play, the other 3 are discarded. This avoids questions where the answer is already obvious to everyone in the wording, there's always a better one to pick instead.

Frequently asked questions

Do I have to play only the Human Body topic?

No, this link opens the game with Human Body already checked, but you can add others from the 20 available topics before starting the match, which widens the deck beyond this topic's 50 questions.

How many Human Body questions does the game have?

50, each with a verifiable source (Encyclopaedia Britannica, StatPearls, Cleveland Clinic or Guinness World Records, depending on the fact) checked in July 2026. That is a slice of Doubt It!'s full bank, which totals 1,000 questions across 20 topics.

How does picking a question within a round work?

Each round, the game shows a fan of 4 candidate questions drawn from the match's shuffled deck, and whoever's turn it is picks 1 for the whole group to answer and bluff over; the other 3 are discarded without being played that round.