Match each term with the correct characteristic given in the key. Key: a. closing the angle at a joint b. movement in all planes c. made of cartilage d. movement toward the body e. fluid-filled sac Flexion

Flexion refers to the bending or decreasing of the angle between two body parts. This usually happens when there is movement at a joint, causing the bones to move closer together. Step 2:

Now that we know what Flexion means, we can examine the given key and choose the characteristic that best defines it. a. closing the angle at a joint - This characteristic seems to match the definition of Flexion as it involves bending and decreasing the angle between two body parts. b. movement in all planes - Flexion does not necessarily involve movement in all planes, as it is a specific type of movement. c. made of cartilage - This characteristic does not describe Flexion, as it is a type of movement and not a structural component. d. movement toward the body - Flexion might involve movement towards the body, but this characteristic does not capture the essence of Flexion as it refers to the bending or decreasing of the angle at a joint. e. fluid-filled sac - This characteristic does not describe Flexion, as it is a type of movement and not an anatomical feature. #Conclusion#: Based on our analysis, the correct characteristic that matches the term "Flexion" is: a. closing the angle at a joint