Essay
Match the structure in the first column with its description in the second column.
_____ 1. systole A. relaxation of heart chambers
_____ 2. diastole B. period of cardiac contraction
_____ 3. anastomoses C. pacemaker of heart
_____ 4. SA node D. amount of blood ejected by the left ventricle each minute
_____ 5. cardiac output E. juncture of two peripheral vessels with the capillary bed
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