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.
Who discovered penicillin in 1928?
AnswerAlexander Fleming
Alexander Fleming noticed in 1928 that Penicillium mold killed bacteria in a culture dish.
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.
Expert level
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.
Who pioneered antiseptic surgery using carbolic acid in the 1860s?
AnswerJoseph Lister
British surgeon Joseph Lister used carbolic acid to clean wounds and instruments, greatly reducing infections after surgery.
Know these cold?Today's round is five questions like these, 20 seconds each. Your streak and level follow you to every arena.Play today's round