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
PDT vs PST . Difference between PDT and PST is simply an hour. However, in order to understand how that one hour difference happens as well as what that one hour time difference means, we should understand what each term refers to. PDT stands for Pacific Daylight Time and PST stands for Pacific Standard Time.