[Laënnec discovered the stethoscope while seeing children play; his discovery made the diagnosis of heart & chest diseases possible].
D006321:Heart; D006331:Heart Diseases; D049671:History, 18th Century; D049672:History, 19th Century; D012120:Respiration Disorders; D019023:Stethoscopes; D013909:Thorax
STETHOSCOPE