How your heart works - Cardiac Cycle

Have you heard your heart beat? What is the sound like? Yes, it sounds like 'lubb-dubb', 'lubb-dubb'! This sound is produced when the heart produces a pressure when it beats. Now, what causes the beating of the heart? The sequence of events that take place during a single heart beat is known as the Cardiac Cycle. It is not so simple. It is a complex process which involves a sequence of activities and that too within 0.8 sec. The cardiac cycle consists of a systole and a diastole. The cardiac cycle begins with a joint diastole (relaxation of all four chambers of the heart). This is followed by an arterial systole (contraction of left and right atria) stimulated by the generation of an action potential by the Sino-Auricular Node (SA node). As a result of the arterial systole, the blood from the atria drains into the ventricles. The impulse produced by the SA Node is then picked up by the Atrio-Ventricular Node (AV node) and is conducted throughout the ventricles leading to the ventricular systole. During the ventricular systole, the blood from the ventricles is drained into the aorta and the pulmonary artery. This is followed by closing of the AV valves which produces the sound 'lubb' and the closure of the Semilunar valves causes produces the sound 'dub'.

How your heart works - Know your cardiac cycle and blood flow in heart.

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Category:

Education

Tags:

• blood flow in body
• bio study
• biology
• education for kids
• kids education video
• kids study video
• online study
• cardiac cycle
• cardiac cycle physiology
• cardiac cycle systole
• cardiac cycle blood flow
• cardiac arteries

[Akash1561993]

cool its same as whats in my text book,...........

[MeritNation]

@Akash1561993 yeah we are here to make studies easy so every one can score top marks

[SuperLadyPrecious]

nyc sumary =) thnx

[MeritNation]

@SuperLadyPrecious Welcome

[peksoy]

the pronounciation sounds like indian.

[idiotkrati]

what is this bitch sayn

[yronwyatt49b]

I want this video on my W209 unit.

[mvalvarez22]

I cannot thank you enough for posting this video. I've spent hours re-reading explanations to understand this concept, but now I understand it very well thanks to you. If possible, could you do an animation with explanations of blood types with Rh factors (i.e. Why O negative is universal donor and AB positive is universal recipient)? Though there are videos with good explanations, there are no good visuals.

Thanks again

[ackiemays11j]

This is a "soft" video. =p

[lordxheroth]

This is 6th form all over again.

[hannybubbles]

I can't understand the accent :(

[irwinchurch25]

Your video is a favorite on Senegal



[ALIA3358]

i almost to start downloaded this video.. and then he start speaking.. erm... im afraid i will laugh all the time during examination...

[iPaused]

Thank you, I finally understand this now. I was having so much confusion reading it the cycle in my notes so, I searched up a video to show it to me visually. Definitely helpful.

[theshayanproduction]

@peksoy

really? i didn't notice...