What type of joint movement increases the angle between two body parts?

The type of joint movement that increases the angle between two body parts is extension. Extension occurs at various joints in the body, such as the elbow or knee, where the body parts move away from each other, resulting in a larger angle. For instance, when you straighten your arm after bending it, you are performing extension, and the angle between your forearm and upper arm increases.

In contrast, flexion is the opposite movement, decreasing the angle between body parts. Adduction refers to moving a body part towards the midline of the body, while rotation describes the turning of a body part along its axis. Understanding these movements is crucial in anatomy and physiology, as they provide insight into how joints function and how muscles contribute to movement.