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.
The hamstrings are the opposing muscles, or antagonists, to the quadriceps muscles located on the front, or ventral, side of the leg. When the quads contract to extend your knee, they pull your leg up and allow you to move it away from your body. In this way, they are the prime mover, or the agonist.