What part plays the role of the fulcrum in the human forearm as a Class 3 lever?

In a Class 3 lever, the effort is applied between the fulcrum and the load. In the case of the human forearm, the elbow acts as the fulcrum. When you lift an object with your hand, your bicep muscle provides the effort, and the load is the weight being lifted.

In this system, the elbow joint is where the rotation occurs, allowing the forearm to move up or down. The bicep muscle pulls on the forearm to lift the load, and since the elbow is positioned between the muscle's effort and the load, it serves as the central pivot point or fulcrum of this lever system. This configuration exemplifies how muscles and joints work together to create movement through levers in the body.