How many chambers does the human heart have?
Answer4
The heart has two atria on top and two ventricles below.
Health · Facts & stats
Med facts & stats
7 fact-checked facts about medicine and the human body, each with the reason behind it. 5 more are in today's round and join this page after it closes.
The basics
How many bones are in the typical adult human body?
Answer206
Adults typically have 206 bones; babies have more, and many fuse together as they grow.
Going deeper
Which ancient Greek physician is often called the 'Father of Medicine'?
AnswerHippocrates
Hippocrates, born around 460 BCE, is honored as the father of Western medicine.
Who discovered X-rays in 1895?
AnswerWilhelm Röntgen
Wilhelm Röntgen discovered X-rays in 1895 and won the first Nobel Prize in Physics in 1901.
Who invented the stethoscope in 1816?
AnswerRené Laennec
French physician René Laennec made the first stethoscope from a rolled tube to listen to the chest.
Expert level
What is the smallest bone in the human body?
AnswerThe stapes
The stapes, a tiny bone in the middle ear, is the smallest bone in the body.
Who discovered the ABO blood groups in 1901?
AnswerKarl Landsteiner
Karl Landsteiner identified the A, B and O blood groups and later won a Nobel Prize for it.
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