All of the following contributes to turbulent blood flow except A) when there are irregularities in the vessel wall. B) at high flow rates. C) when there are sudden changes in vessel diameter. D) third and fourth heart sounds. E) when heart valves open.

All of the following contributes to turbulent blood flow except  third and fourth heart sounds.

The blood flow in human body is always described to be laminar. Some conditions cause the high flow when there is an ascending aorta. This causes the laminar flow of blood into turbulent. When this occurs the flow of the blood will not be smooth and linear.  

When the kinetic energy in the fluid flow increases the turbulent flow of blood occurs. Both the magnitude and the direction of the flow changes in this type of blood flow. These are caused by the irregularities in the vessel walls, flow rates to ne higher and opening of the valves of the heart.

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