Functionally, all synovial joints are classified as which type of joint?

• A. Amphiarthroses
• B. Synarthroses
• C. Syndesmoses
• D. Diarthroses

Answer: (D)

Verified step by step guidance

1. Step 1: Begin by understanding the functional classification of joints. Joints are classified based on their movement capabilities into three categories: synarthroses (immovable joints), amphiarthroses (slightly movable joints), and diarthroses (freely movable joints).
2. Step 2: Recall that synovial joints are characterized by the presence of a synovial cavity filled with synovial fluid, which allows for a wide range of motion. This structural feature is unique to synovial joints.
3. Step 3: Connect the structural classification of synovial joints to their functional classification. Since synovial joints allow free movement, they are functionally classified as diarthroses.
4. Step 4: Review examples of synovial joints, such as the shoulder joint, hip joint, and knee joint, to reinforce the concept that these joints allow significant movement and are classified as diarthroses.
5. Step 5: Conclude by emphasizing that synovial joints are always functionally classified as diarthroses due to their ability to permit free movement in various directions.