Comparison of Mammalian Heartbeats
In Chapter 6, you learned that the two-part beat of a pumping heart is caused by the closing of first the atrioventricular valves (LUB), then the semilunar valves (dupp). Review the location and function of these valves. Then, go to this web site and clic
Visit the Howard Hughes Medical Institute web site
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Open Heart Surgery
In Chapter 6, you read about how doctors have started to use arteries from the chest cavity instead of leg veins to replace coronary arteries of the heart that have become blocked by plaque. In the video at this site, you can watch coronary bypass surgery
Visit the Take a Look Inside web site
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