What type of joint is partially movable?

• A. Synovial
• B. Fibrous
• C. Amphiarthrodial
• D. Synarthrodial

Answer: (C)

Amphiarthrodial joints are classified as partially movable joints. This type of joint allows for limited movement between the bones it connects, providing both stability and flexibility. An example of an amphiarthrodial joint can be found in the intervertebral discs of the spine and the pubic symphysis, where slightly flexible movement is necessary to accommodate various activities while maintaining structural integrity.

When considering the other joint types, synovial joints are characterized by a wide range of motion and fluid-filled cavities, fibrous joints generally provide no movement between the bones (e.g., sutures in the skull), and synarthrodial joints are immobile, further supporting the uniqueness of amphiarthrodial joints in allowing limited mobility. Understanding this classification helps in the study of human anatomy and the mechanics of movement in the body.