What does adduction refer to in anatomical terms?

Adduction refers to the movement of a body part toward the midline of the body. In anatomical terms, it is specifically associated with actions such as bringing the arms or legs closer to the torso. The idea behind adduction is that it "adds" a limb or body part to the central axis of the body, thus 'adding' it to the body’s midline. This term is commonly used in discussions regarding movements of the limbs and is essential for understanding various physical activities and medical conditions related to muscle and joint functions.

In contrast, the other options reflect different types of movements. Removal of a body part away from the midline is defined as abduction, rotation involves turning around an axis, and extension refers to increasing the angle between body parts. Understanding adduction is crucial for anyone studying anatomy and physiology, as it forms the basis for many more complex bodily movements.