Which joints allow slight rocking movement?

Cartilaginous joints are designed to allow limited movement, which is often described as slight rocking motion. These joints are formed by cartilage, which provides a cushion and allows for some flexibility. A common example of cartilaginous joints is the intervertebral discs in the spine, where the vertebrae are connected and can slightly move to accommodate bending and twisting movements of the back.

Other types of joints serve different functions. Fibrous joints, such as those found in the skull, permit little to no movement, essentially acting as solid connections. Slightly movable joints, while a valid descriptor, is a less specific term that can encompass different types of joints, including cartilaginous joints. Synovial joints, on the other hand, are characterized by their wide range of motion, enabling movements such as rotation, flexion, and extension, but they do not describe the specific slight rocking motion that cartilaginous joints do. Thus, the definition and characteristics of cartilaginous joints make them the correct choice for slightly rocking movement.