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Freaky Wikipedia "Pic of the Day" - perhaps GRAPHIC for some?
https://en.wikipedia.org/wiki/Main_Page (main page, towards the bottom)
A computer-generated animation showing the cardiac cycle, which is the performance of the human heart from the ending of one heartbeat to the beginning of the next. It consists of two periods: one during which the heart muscle relaxes and refills with blood, called diastole, followed by a period of robust contraction and pumping of blood, known as systole. After emptying, the heart immediately relaxes and expands to receive another influx of blood returning from the lungs and other systems of the body, before again contracting to pump blood to the lungs and those systems. A normally performing heart must be fully expanded before it can efficiently pump again. Assuming a healthy heart and a typical rate of 70 to 75 beats per minute, each cardiac cycle or heartbeat takes about 0.8 seconds to complete.
Animation credit: Doctor Jana
A computer-generated animation showing the cardiac cycle, which is the performance of the human heart from the ending of one heartbeat to the beginning of the next. It consists of two periods: one during which the heart muscle relaxes and refills with blood, called diastole, followed by a period of robust contraction and pumping of blood, known as systole. After emptying, the heart immediately relaxes and expands to receive another influx of blood returning from the lungs and other systems of the body, before again contracting to pump blood to the lungs and those systems. A normally performing heart must be fully expanded before it can efficiently pump again. Assuming a healthy heart and a typical rate of 70 to 75 beats per minute, each cardiac cycle or heartbeat takes about 0.8 seconds to complete.
Animation credit: Doctor Jana
Queue Sonny and Cher:
3 replies
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= new reply since forum marked as read
at that muscle... the ability to work day in, day out for decades, without a rest 
pretty spectacular!!
...and never goes on holiday! 
