Which of the following is not a distinguishing feature of a synovial joint?

• A. Fibrous capsule lined with synovial membrane
• B. Direct connection between bones without a cavity
• C. Articular cartilage covering the ends of bones
• D. Presence of a joint cavity

Answer: (B)

Verified step by step guidance

1. Understand the structure of synovial joints: Synovial joints are characterized by the presence of a joint cavity, which is filled with synovial fluid. This cavity allows for free movement between the articulating bones.
2. Identify the components of synovial joints: Synovial joints typically have a fibrous capsule lined with a synovial membrane, which secretes synovial fluid. They also have articular cartilage covering the ends of the bones to reduce friction during movement.
3. Recognize the distinguishing features: The presence of a joint cavity is a key feature that distinguishes synovial joints from other types of joints, such as fibrous or cartilaginous joints.
4. Evaluate the options: Consider each option provided in the problem and determine whether it is a feature of synovial joints. The fibrous capsule, synovial membrane, articular cartilage, and joint cavity are all features of synovial joints.
5. Identify the incorrect feature: A direct connection between bones without a cavity is not a feature of synovial joints. This describes fibrous or cartilaginous joints, which do not have a joint cavity.