What term is used for joints that allow free movement in several directions?

The term used for joints that allow free movement in several directions is "synovial joints." These joints are characterized by a synovial cavity filled with synovial fluid, which lubricates the joint and facilitates smooth movement. The structure of synovial joints includes features such as cartilage on the ends of the bones, ligaments that help stabilize the joint, and sometimes bursae, which are fluid-filled sacs that reduce friction.

Unlike fibrous joints, which are connected by dense connective tissue and allow little to no movement, synovial joints provide the flexibility needed for a wide range of activities. Similarly, cartilaginous joints, which are connected by cartilage, also do not allow for the same level of movement as synovial joints. Immovable joints, as their name suggests, do not permit any movement at all. Therefore, synovial joints stand out for their ability to enable a diverse range of motion, making them essential for numerous bodily functions and activities.