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.
Two of the hamstring muscles -- the semimembranosus and semitendinosus -- lie on the inner side of the back of your thigh.Both muscles originate from the sitting bone, or ischial tuberosity, on the back of the pelvis.he hamstring muscles run along the back of your thigh, from your pelvis to your lower leg.