The longest muscle in the human body is the sartorius muscle. The sartorius muscle is a long, thin muscle that runs down the front of the thigh from the hip to the knee. It is a superficial muscle, meaning that it lies just under the skin and can be easily felt in thin individuals. The sartorius muscle is involved in a variety of movements, including flexion, abduction, and external rotation of the hip, as well as flexion of the knee. It is sometimes referred to as the “tailor’s muscle” because it is used when sitting cross-legged like a tailor. The sartorius muscle is also one of the weakest muscles in the body due to its long and thin shape.
