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The first sound of the heart is made by the bi- and tri- cuspid valves closing once the ventricles fill up with blood. The sounds themselves are not due to the sound of the valves actually closing, though it is caused by the rapid deceleration of blood hitting the closed valves (i.e. mitral valve closes - blood from LA filling LV hits the valve & heart walls, decelerating, resulting in reverberation of the heart walls, thus giving the S1). The second sound is made by the pulmonary and aortic semi-lunar valves via the same processes as S1.
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Wiki User
∙ 11y ago
Wiki User
∙ 11y agoThe contraction of the Atria of the heart.
Closure of the mitral and triscupid valves
Wiki User
∙ 11y agoThe closing of the atrioventricular valves provides the "LUB" part of a heartbeat, followed by the "DUB" of the semilunar valves (aortic and pulmonary valves).
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∙ 13y agoApex-type question, merged, split alts
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What makes the first sound of a heartbeat?
The first sound, LUB, is made after the ventricular systole due to the shutting of bicuspid and tricuspid (AV) valves.
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 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 word is used for a heartbeat sound?
thump thump!
How will you call the sound of the heartbeat?
They are called Lubb Dubb
How is heart sound related to heartbeat?
are related the sound because is cionsideriza to heart beat hahahahha.
What are 2 repetition in the tell take heart?
the sound of a heartbeat
How is the sound of the heartbeat created?
A tiny dinosaur banging a drum
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.
What is the name of sound made by letter H?
· hiccup · hiss · howl · hum · heartbeat
