The sequence of events that occurs as the heart pumps blood through the body is called the cardiac cycle. A single "beat" involves systole, diastole, and an intervening pause. Systole is the contraction of the heart, during which blood in the chambers is forced onward. Diastole is the relaxation and dilatation of the chambers, especially the ventricles, during which they fill with blood. What onomatopoeic words are used in medical literature to describe the heartbeat sound heard during systole?
Back in the day
American multimillionaire Dennis Tito gained celebrity status in 2001, when he became the first person to pay for his own ticket to space. The 60-year-old spent nearly eight days in space, most of them on the International Space Station. A former scientist of the NASA Jet Propulsion Laboratory, Tito made his fortune as a founder of Wilshire Associates, an investment management, consulting, and technology services company. How much did his ticket aboard the Russian Soyuz TM-32 allegedly cost?
Born on a day like today
Lamborghini was a successful Italian tractor manufacturer and sports car enthusiast who founded a luxury car company in 1963, allegedly after a spat with Enzo Ferrari. The story goes that Lamborghini was dissatisfied with the clutch in one of his Ferraris and voiced this to Enzo Ferrari, who dismissed the complaints as those of a mere tractor maker. Infuriated, Lamborghini decided to retaliate by creating his own superior sports car. Why did he choose the image of a bull for his company's logo?