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
Sorry........... tan and cot are NOT inverses of each other ... tan = opp / adj, and cot = adj / opp , ... so tan = 1 / cot, or cot = 1 / tan, .... but this is NOT = tan^-1. also, tan = sin / cos, and cot = cos / sin , so we can see why tan = 1 / cot and cot = 1 / sin. the inverse of tan is tan^-1.........