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.
Bureau of Labor Statistics. The federal Bureau of Labor Statistics tracks a variety of work-related data for plumbers, including salary information. According to figures released in May 2011, the nearly 350,000 plumbers in the country earned an average of $24.92 per hour, or approximately $51,830 per year.