Which muscle is uniquely qualified to flex both the hip and knee?

Question

Quizplus · Accepted Answer

The sartorius muscle is the longest muscle in the body, and it is uniquely qualified to flex both the hip and the knee. It runs diagonally across the thigh, crossing over both the hip and the knee joints, and is often referred to as the "tailor's muscle" because it is used when sitting cross-legged like a tailor. The other three muscles listed in the question can flex either the hip or the knee, but not both.

Which Muscle Is Uniquely Qualified to Flex Both the Hip