A derecho (/dÉËreÉªtÊoÊ/, from Spanish: derecho [deËÉ¾etÊo], straight) is a widespread, long-lived, straight-line wind storm that is associated with a land-based, fast-moving group of severe thunderstorms. Derechos can cause hurricane-force winds, tornadoes, heavy rains, and flash floods.
In human anatomy, a hamstring is one of the three posterior thigh muscles in between the hip and the knee. In quadrupeds, the hamstring is the single large tendon found behind the knee or comparable area.
Factor #1: The Anatomical Paradox. The hamstrings are a large set of four muscles at the back of the thighs (Figs. 1a and 1b). Their common name originated in 18th-century English meat markets, where slaughtered pigs were hung by a string through the large tendon at the back of their hind legs. We know the feeling!