One complete heart beat, during which both atria and ventricles contract and relax, is termed _____ and is marked by a succession of changes in _____ and _____. within the heart the cardiac cycle, blood volume, pressure
Pan vs. Epi(demic) Good to know: An âepidemicâ is simply a proliferation of an infectious disease beyond that normally observed. A âpandemicâ is an epidemic that spreads across regions or continents. The number of dead is not part of the definition. Indeed, a pandemic may kill no one at all. October 27, 2009
DPI means Dots Per Inch and tells the number of printed points (dots) per inch. PPI means Pixel Per Inch and tells the number of pixels per inch. DPI and PPI are basically the same, except PPI is the more correct designation, and DPI only applies to certain printers and printing methods.