Which of the following is true when a joint is said to be in flexion?

When a joint is said to be in flexion, it specifically means that the angle between the bones forming the joint decreases. This movement is typical in joints such as the elbow or knee when you bend the arm or leg respectively. In flexion, the two segments of the joint come closer together, resulting in a smaller angle. This is fundamental to understanding the mechanics of movement in veterinary medicine, as assessing the range of motion in a joint can help diagnose issues or track recovery in animals.

The other concepts, like increasing the joint angle, rotating the joint, or moving the limb toward or away from the body, describe different movements or actions that do not align with the definition of flexion. This clarity is essential in fields such as veterinary anatomy and physiology, where precise terminology can significantly impact assessment and treatment strategies.