Definition
The sartorius is a long, thin muscle that runs down the length of the thigh, crossing both the hip and knee joints. It's the longest muscle in the human body! π Think of it as a sash draped across the front of your leg. It helps you flex, abduct, and externally rotate your hip, as well as flex your knee. This allows you to cross your legs. The sartorius is essential for activities like walking, running, and kicking. It also helps stabilize the hip and knee.