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I was able to do some reading and research and I found some interesting information that was a). news to me. And b). the answer is yes... And no. A spasm can be the cause of a heart attack by causing the coronary artery to contract. When that artery contracts, it causes a dramatic decrease in blood flow to the heart. When the heart looses access to ...


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I think the question is not whether the blood flux is constant in time, but rather in space: if 5L/min is the flux through aorta (in given physiological conditions), then at the same moment 5L/min will cross the capillaries. This is volume conservation, for a closed system filled with an incompressible fluid, see this sketch: If 5L are pushed through the ...


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It is ofc. not true, because it is not a closed system. The kidneys filter blood and excrete water and other compounds (which are reabsorbed or go to urine), the sweat glands remove water and salts. By drinking daily 2 liters (the total blood volume is about 5 liters) of fresh water and salts are absorbed from the intestines to the circulation, by eating ...


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Nope. All blood flows in the body can change at any time(more or less). If the heart rate and blood pressure, etc, is constant the amount of blood that travels through the aorta is constant, yes. But there is far more capacity in the arterial and venous systems for the actual amount of blood flow there normally is. Veins and arteries contract and expand to ...


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The amount of blood flow is not constant in general. As you exert yourself, your heart rate and therefore blood flow increases. Furthermore, individual vessels dilate or constrict to increase or decrease flow by modulating their resistance to flow. Your circulatory system is closed however, so all of the blood leaving the heart must eventually come back ...


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I am pretty sure he meant as long as the external stimulus is absent. Considering that there is no change in physical condition it should be same because like he said it is a closed system (no loss or gain in a given period of time). However, if one is engaged in physical activity then heart will pump more blood and per minute flow rate will change for sure. ...


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The wikipedia page for CPR actually goes into some detail on this, going to block quote the section here for ease of access, Compression-only (hands-only or cardiocerebral resuscitation) CPR is a technique that involves chest compressions without artificial respiration. It is recommended as the method of choice for the untrained rescuer or those who are ...



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