What does flexion denote in terms of body movement?

Flexion refers specifically to the movement that decreases the angle between two body parts, effectively bending them toward each other. This action is commonly seen in joints such as the elbow, knee, and fingers, where the body part moves towards a more compact position. For instance, when you bend your elbow to bring your forearm closer to your upper arm, that is flexion in action.

This term is crucial in anatomy and physiology as it helps describe how joints work and how body movements are categorized during various activities. In contrast to other types of movements, flexion does not involve straightening (which is extension) or moving away from the body (which could be abduction). Understanding flexion is foundational for studying body mechanics and is applicable in various fields, including physical therapy, sports science, and anatomy education.