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.
My eyes are so much happier having switched to Frequency 55 Toric XR contacts. They used to become irritated mid-day, and it made it a hassle to wear contacts. These fit comfortably and stayed in place on my eye all day long.