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..., which operates the upper chambers of the heart, Ventrical muscle, which operates the lower chambers of the heart, and specialized excitatory muscles, which don't contract as much, but "exhibit rhythmicity and varying rates of conduction, providing an excitatory system for the heart." (according to Guyton). Together they create an interesting dynamic, one unlike any other muscle in the body. ...

http://moss--agate.livejournal.com/767.html
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Published: 10 months, 2 weeks ago (Sun, 31 Aug 2008 16:50:54 PDT); 19 Kb
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