The |sartorius| is the body's longest muscle. It is a long, narrow, ribbon-like muscle that spirals down the thigh. It begins on the front of the hip, where it originates at the front point of the |pelvis| (the tip of the ~anterior~ superior iliac |spine|), runs down and across the front of the thigh, and along the inner side of the knee where it is anchored on the upper end of the |tibia|. This muscle is a powerful flexor of the thigh. It helps bend both hip and knee and twist the leg allowing you to sit cross-legged.
