Heartbeat
Heart is a systematic organ .It is made up of muscles .In the process of circulation of blood in heart , the heart muscles gets pump up as the blood enter in it and decrease up when blood go out of heart .In this way heart gets contract and relax back to back once or twice in one second .The back to back contraction and relaxation of heart called heartbeat .Did all ever feel the sound of our heartbeat, actually it’s sound like lub – dub .The rotation of blood through the chambers of heart is responsible for that sound .Normally the heartbeats 65 to 75 times in a minute .Our speed of heartbeat is depend on the activity we do at that time .If we run our heart beats very fast and rate upto 100 – 120 per minute .If we sit at one place only then our heart beats normally .Will u all ever think that what happen when the heartbeat stopped? If the beating of heart will stop then all functions of body get stop and the person will die .We all see that doctors always wear one instrument around the neck ,What’s that instrument ? It is a stethoscope.
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What is stethoscope?
Stethoscope is a instrument used by doctors to check up and count heart beat of patient .If the heart beats drop down or increase up from normal value then patient is not fine . Stethoscope is divided into three parts i.e ,chest piece ,tubule ,ear piece .
1) Chest piece :
Chest piece is the main part of stethoscope from where we can hear the beats of heart .It is round in shape and has supporter at back side to hold it.
2) Tubules :
Tubules is the middle piece of stethoscope .It is tube like structured and help to transfer the sound of heart beat to ear piece.
3) Ear piece :
Ear piece is the end part of stethoscope and connected to tabules. It is plug up into ears to hear the heart beats.
- Question based on topic :
1)What is heartbeat ?
2)How many times did heart beat in a minute?
3)What is stethoscope?
4)Explain the parts of stethoscope.