Final answer:
The slightly movable joints found at the pubic symphysis and between vertebrae are known as symphysis, which is a type of cartilaginous joint connected by fibrocartilage.
Step-by-step explanation:
The type of joint that is slightly movable, such as the joint between the pubic bones of the pelvis (pubic symphysis) and the joints between the bodies of the vertebrae, is called a symphysis. These joints are connected with fibrocartilage which allows for limited movement. A symphysis is a type of cartilaginous joint characterized by a narrow gap between the bones, which is filled with fibrocartilage. The pubic symphysis of the pelvis is held together by this fibrocartilage, granting it only a small degree of mobility while providing significant weight-bearing stability to the pelvis. This is important for functions such as standing and walking, as it helps to absorb shock and allow slight movements that are critical for balance and motion.
In comparison, freely movable joints called synovial joints are filled with lubricating fluid, permitting a wide range of motion necessary for activities like kicking, picking objects, and dancing. However, despite their mobility, these joints are less stable than amphiarthrotic joints like the pubic symphysis.