Which instrument do doctors use to listen to the heart and lungs?
AnswerStethoscope
A stethoscope carries sounds from the chest to the listener's ears through tubing.
Health · Facts & stats
Clinical facts & stats
7 fact-checked facts about clinical medicine and its history, each with the reason behind it. 5 more are in today's round and join this page after it closes.
The basics
How many chambers does the human heart have?
Answer4
The heart has four chambers: two upper atria and two lower ventricles.
Going deeper
Who invented the stethoscope in 1816?
AnswerRené Laennec
French physician René Laennec invented the stethoscope in 1816, first as a rolled paper tube and then a wooden one.
In a clinical trial, what is a placebo?
AnswerAn inactive treatment given for comparison
A placebo looks like the real treatment but has no active ingredient, letting researchers compare results fairly.
What does 'double-blind' mean in a clinical trial?
AnswerNeither participants nor researchers know who gets which treatment
In a double-blind trial neither the participants nor the researchers know who receives which treatment, reducing bias.
Expert level
The word 'clinical' comes from a Greek word meaning what?
AnswerBed
'Clinical' comes from Greek 'klinē', meaning bed, because it first described medicine practiced at the bedside.
Which red blood cell type is often called the universal donor?
AnswerO negative
O negative red cells lack A, B and RhD antigens, so they can be given to most patients; AB positive is the universal recipient.
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