Question

the series of events that occur during one complete heartbeat

Answer 1

Hey MATEphase 1= Atrial systole
blood flows to the inferior or superior vena cava and the atria begin to contract, the AV valves open and the blood enters the ventricles, the ventricles relax and the SL valves are closed: Depolarization (contraction) of SA node occurs, p wave.

What is the P wave?
This happens in the first phase of the cardiac cycle and is caused by the depolarizaton or contraction of the SA node.

Phase 2 is called?
isovolumetric ventriclular contraction.

What occurs during phase 2 isovolumertic ventricular contraction?
The first heart sound is created, due to the AV valves closing, the ventricular blood volume is constant as the pressure increases. In other words the bv is the same in the ventricles whlie they are contracting.

phase 3 is called?
ejection

what happens during phase 3 ejection?
The SL valves open up and the blood gets ejected rapidly causing the initial contraction or a reduced ejection that is just a less abrupt first contraction.

Residual volume is blood that remains in the ventricles after the contraction, what occurs if this happens?
Congestive heart failure. Too much residual volume, this residual volume would exceed the amount being rejected, the decreased outflow of blood from the left ventricle of the heart will cause an enlarged heart

What is phase 4 called?
isovolumetric ventricular relaxation

Congestive heart failure (phase 3)
The amount of residual blood progressing over time left in the left ventricle, makes the ventricle have a weaker contraction and the lungs and tissue get less blood supply=less oxygen & nutrients.

Isovolumetric ventriclular relaxation happenings? phase 4
the heart makes the second sound "dub" due to the SL valves closing. Ventricular blood volume is opposite then in IV-contraction because while the blood volume is constant in the ventricles the pressure is decreasing.

What is phase 5 of the cardiac cycle called?
Passive ventricular filling

What happens during ventricular filling?
The ventricles to continue to relax and as the pressure increases the ventricles fall and the AV valves slightly open up secondary.... Not because of an atrial contraction but because gravity, the weight of the blood on top of the AV valves is heavy.

1)atrial systole
2)Isovolumetric ventricular contraction
3) Ejection
4)isovolumetric ventricular relaxation
5)passive ventricular filling
cardiac phases.

Hope it helps

Hakuna Matata :))

Answer 2

there is a series of events which occur during one complete Heartbeat which can be listed as follows first both their dreams contractor simultaneously as a result the blood passes into the ventricles this takes about 0.15 seconds then next both the ventricles simultaneously due to this the blood is forced into the rotor and pulmonary trunk this takes 0.30 seconds now both ventricles and atriums relax this is called the general post all these three sequential events of contraction and relaxation in a Heartbeat makes a cardiac cycle this occurs in 0.40 seconds