Question

bio - 201 topic 3: the integument, skeleton, and articulations
practice it
what is the characteristic feature of synovial joints?
they have a solid joint cavity.
they have a fluid - filled joint cavity.
they have a gas - filled joint cavity.
they have no joint cavity.
they have a joint cavity filled with bone.

Explanation:

Synovial joints are characterized by having a fluid - filled joint cavity called the synovial cavity. This synovial fluid lubricates the joint, reducing friction and providing nutrients to the articular cartilage.

Answer:

They have a fluid - filled joint cavity.