What does flexion of a joint entail?

Flexion of a joint is characterized by the motion of bending that results in a decreased angle between the bones that comprise the joint. This movement typically brings the two segments closer together, as seen in actions such as bending the elbow or knee. When the joint flexes, the angle created by the two parts of the limb becomes smaller, allowing for a more acute alignment of these segments. This fundamental concept is essential in understanding how muscles and joints function during various physical movements and activities.

The other options describe different types of movement: straightening a joint refers to extension, moving a limb away from the body is known as abduction, and rotation involves turning around an axis rather than bending the joint. Recognizing these distinctions helps in comprehending the mechanics of human movement in sports medicine and physical therapy.