Question

John prepared stethoscope with paper cup and string. Write down the procedure of preparation.

SCERT Telangana Class 10 Biology Respiration

Answer 1

1.Take paper cup which is in the shape of funnel and size of 6-7 cm
2.Fix a rubber tube at narrow end of paper cup.
3.Fix the paper cup in shape with the help of an elastic string.
4.Put the pen end of the cup on your chest and the rubber tube in your ear and you can hear the heart beat

Answer 2

Answer:

first prepare for the stethoscope and using with paper cups and plaster and plastic tubes