Annual deaths from tornadoes, earthquakes and floods together total fewer than 200. The most deadly heat wave in recent years occurred in Chicago over a week in July 1995, when temperatures hovered around 100 degrees.
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.
Artwork: Left artwork: Without a surge protector, the hot/live (brown) and neutral (blue) connections provide power to your appliance. The ground (green) connection is typically wired to the metal case to provide a safe way for stray currents to escape, but it's not involved in powering the appliance.