Archive image from page 252 of Directions for laboratory work in Directions for laboratory work in physiology for the use of medical students directionsforlab00lomb Year: 1914 NORMA!, SOUNDS OP HEART. 223 EXPERIMENT XXXIX. The Normal Sounds of the Heart. The normal heart sounds may be heard with the unaided ear, but the stethoscope is commonly used. It consists es Fig. 42. Diagram showing position of heart in chest, position of valves as projected on the wall of the chest, and the parts of the chest where the sounds of the heart are heard best. M, position of apex beat, and sound from mit
Archive image from page 252 of Directions for laboratory work in Directions for laboratory work in physiology for the use of medical students directionsforlab00lomb Year: 1914 NORMA!, SOUNDS OP HEART. 223 EXPERIMENT XXXIX. The Normal Sounds of the Heart. The normal heart sounds may be heard with the unaided ear, but the stethoscope is commonly used. It consists es Fig. 42. Diagram showing position of heart in chest, position of valves as projected on the wall of the chest, and the parts of the chest where the sounds of the heart are heard best. M, position of apex beat, and sound from mitral valve; T, sound from tricuspid valve; A, sound from aortic valve; P, sound from pulmonary valve. sentially of a receiving disk and a pair of ear-tubes, con- nected by tubing. It aids by multiplication of the sound and by excluding outside sounds. Distracting noises, to be
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