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.
Firefighters' salaries vary according to experience and location of the job. Full-time firefighters earned an average $47,720 per year, as of May 2011, according to the Bureau of Labor Statistics. The lowest-paid made less than $22,480 a year, while the highest-paid received over $75,520 per year. A typical schedule for this compensation includes 24-hour shifts on duty, followed by 48 to 72 hours off.