The beats that you feel of your pulse.
Normal heart sounds (often called lub-dub) are caused by the pressure changes in the ventricles closing the various heart valves. The first sound, lub, is caused by the closing of the atrioventricular valves after the ventricles have filled with blood and as the ventricles begin to contract. The second sound, dub, is caused by the closing of the semilunar valves as the ventricles relax after pushing blood forward.
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Cramps are caused by the uterus to expel its lining.
Cramps are caused by the uterus to expel its lining.
thunder
The 'lub' is caused from turbulence of the blood in the ventricles once they have contacted. The 'dub' is the backflow of blood against the semi-lunar valves in the pulmonary artery and aorta once it has been squeezed out by the ventricles.
Pulse.
Pulse
In the lub-dub version of heart sound, dub is caused by the back rush of blood against a closed aortic or pulmonary valve.
Hiccups are caused by the diaphragm contracting suddenly and compressing the lungs.
what precautionary measures are taken to minimize the damage caused by the tsunami
Preload is caused by decreased blood volume in ventricles. Therefore, decreased preload directly caused by bleeding, polyuria, dehydration.