stethoscope

When it comes to medicine, everyone thinks of the doctor in a white blouse and a stethoscope worn on his neck.

In the early 19th century, Dr. Laënnec met two children who sent each other a hollow wooden tree, and he invented a medical examination instrument made of wood.

Listening to the heart with a stethoscope is one of the most common operations of a doctor for patients. Could it be that in the information age, that