Which functional joint class includes freely moveable joints?


a. Amphiarthroses
b. Synarthroses
c. Diarthroses
d. All functional joint classes are freely moveable.

Verified step by step guidance

1. Identify the three main functional joint classes: synarthroses, amphiarthroses, and diarthroses.
2. Understand the characteristics of synarthroses: these joints are immovable and are typically found in the skull.
3. Understand the characteristics of amphiarthroses: these joints allow slight movement and are often found in the spine.
4. Understand the characteristics of diarthroses: these joints are freely moveable and are commonly found in the limbs.
5. Determine which joint class matches the description of being freely moveable.

Key Concepts

Functional Joint Classes

Functional joint classes categorize joints based on their movement capabilities. The three main types are synarthroses (immovable), amphiarthroses (slightly movable), and diarthroses (freely movable). Understanding these classifications helps in identifying how joints function in the human body.

Diarthroses

Diarthroses are a type of joint that allows for a wide range of motion. These joints are characterized by a synovial cavity, articular cartilage, and a joint capsule, enabling movements such as flexion, extension, rotation, and more. Examples include the knee, elbow, and shoulder joints.

Synarthroses and Amphiarthroses

Synarthroses are joints that do not allow any movement, such as sutures in the skull, while amphiarthroses permit limited movement, like the joints between vertebrae. Understanding these two types is essential for distinguishing them from diarthroses, which are the only functional joint class that is freely movable.