How the stethoscope was invented | Moments of Vision 7 - Jessica Oreck

source: TED-Ed    2016年12月29日
View full lesson: http://ed.ted.com/lessons/how-the-ste...
The stethoscope is the single most widely used medical instrument in the world. But where did the idea come from? In the seventh installment of our ‘Moments of Vision’ series, Jessica Oreck shares the modest origins of this incredibly useful item.
Lesson and animation by Jessica Oreck.