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.
A pulled hamstring or strain is an injury to one or more of the muscles at the back of the thigh. Most hamstring injuries respond well to simple, nonsurgical treatments. The hamstring muscles run down the back of the thigh. They start at the bottom of the pelvis at a place called the ischial tuberosity.