Final answer:
The functional classification of joints is based on the type and degree of movement. Movable joints allow the most movement and are the most common type of joint in the body.
Step-by-step explanation:
The functional classification of joints is based on the type and degree of movement that they allow. There are three types of joints in the functional classification: immovable, partly movable, and movable joints. Movable joints allow the most movement and are the most common type of joint in the body. Examples of movable joints include fingers, toes, hips, elbows, and knees.