Final answer:
Angular movements occur when the angle between the bones of a joint changes. Flexion decreases the angle, while extension increases it. Rotation is the movement of a bone as it rotates around its own axis.
Step-by-step explanation:
Angular movements are produced when the angle between the bones of a joint changes. Flexion, or bending, occurs when the angle between the bones decreases. Moving the forearm upward at the elbow is an example of flexion. Extension is the opposite of flexion in that the angle between the bones of a joint increases. Rotational movement is the movement of a bone as it rotates around its own longitudinal axis. Movement of the head as in saying "no" is an example of rotation.