Which term describes the movement that increases the angle between two adjoining bones in the context of joints in the skeleton?

The term that describes the movement which increases the angle between two adjoining bones in the context of joints in the skeleton is extension. This movement typically occurs at hinge joints, such as the elbow and knee, as well as at other joints, allowing for the straightening of limbs or parts of the body. When extension occurs, the bones move away from each other, leading to an increase in the angle at the joint. This is the opposite of flexion, which decreases the angle between the bones. Understanding these movements is crucial for analyzing how joints function and contribute to overall mobility in the skeletal system.