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The first sound, LUB, is made after the ventricular systole due to the shutting of bicuspid and tricuspid (AV) valves.

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11y ago
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9y ago

The familiar sound of the heartbeat is caused by the closing of the valves in the heart. This is done rhythmically to let blood in and out of the chambers of the heart.

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Q: What makes the first sound of a heartbeat?
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What makes the sound of your heartbeat?

The heart valves.


Which part of the heart makes the heartbeat sound?

A heartbeat produces the familiar "LUB-DUP" sounds as the chambers contract and the valves close. The first heart sound, "lub," is heard when the ventricles contract and the atrioventricular valves close. This sound last longest and has a lower pitch. The second heart sound, "dub," is heard when the relaxation of the ventricles allows the semilunar valves to close.


What happens during the first stage of a heartbeat?

A heartbeat has two parts the first part in the flow of the blood into the heart. The second part is the flow of the blood out of the heart. That is why heart beat is a bub-bub sound.


What word is used for a heartbeat sound?

thump thump!


How will you call the sound of the heartbeat?

They are called Lubb Dubb


How does a normal heartbeat sound?

makes two sounds, "lubb" when the valves between the atria and ventricles close, and "dupp" when the valves between the ventricles and the major arteries close


How is heart sound related to heartbeat?

are related the sound because is cionsideriza to heart beat hahahahha.


How is the sound of the heartbeat created?

A tiny dinosaur banging a drum


What are 2 repetition in the tell take heart?

the sound of a heartbeat


What part of the nervous system makes a heartbeat slow?

Parasympathetic


Why does Scott Calvin's heartbeat sound like jingle bells?

hes a Dj


What are terms for heart beats?

Pulse (pulse = to beat) or Complete Cardiac Cycle (beginning of one heartbeat until the beginning of the next) are two medical term for "heartbeat". Listen to your heartbeat and you might distinguish two sounds. The first sound is the closing of the upper atrioventicular valves. The second sound is the closing of the semilunar valves. This is the pushing of the blood out of the heart. Between beats, the heart is filling with blood and preparing for another push or pulse.