| http://www.w3.org/ns/prov#value | - Cushioning of the heart; Reduce friction during heart activity. ??? ??? ??? Ventricular systole the contraction, or period of contraction, of the heart, especially of the ventricles ??? ??? ??? the contraction, or period of contraction, of the heart, especially of the ventricles, is called ____ Ventricular systole Please allow access to your computer???s microphone to use Voice Recording.
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