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.
Eye Contact. 1  Looking while talking: This establishes a rapport with the person listening. 2  Looking while listening: This reciprocates the rapport established. This aspect is often used during emotional connections such as flirting. 3  Frequency of glance: This indicated involvement and how invested one is to the conversation.