Cardiac Cycle: 1st Systole Phase. During the systole phase, the right ventricle receives impulses from the Purkinje fibers and contracts. The atrioventricular valves close and the semilunar valves open. The de-oxygenated blood is pumped into the pulmonary artery.
Congressional Salaries. As of 2012, the annual salary for any congressman, from first-term representatives to the most senior members -- except those holding leadership positions -- was set at $174,000. This was the compensation level set as of January 1, 2009, and frozen by law in the intervening years.
Based on the 2010 census, each Congressional district has an average population of about 711,000, which is nearly a 10 percent increase from the 2000 census, when each district had an average of 647,000 people. In 2010, some states lost congressional seats and others gained them.