Hinge joints are protected by cartilage and synovial ... A joint is formed by the joining of two or more bones together. The human body has three main classifications of joints that are ...

Hinge joints allow flexion and extension only. Flexion – bending a joint. This occurs when the angle of a joint decreases. For example, the elbow flexes when performing a biceps curl.

The robot’s arm moves in the same way as a human’s arm. Yes ... It just opens… and closes. It’s a hinge joint. Oh! You’ve had an idea. You could use a hinge? Well, it will move in ...