Jessica's mother takes her to see her pediatrician, who refers her to a rheumatologist, a doctor who specializes in rheumatic diseases. This doctor withdraws some synovial fluid using a small needle from Jessica's warm, swollen, tender knee that has limited motion. What types of joint are freely movable like the knee?

a. Synchrondroses are freely movable joints.

b. Amphiarthroses are freely movable joints.

c. Synarthroses are freely movable joints.

d. Diarthroses are freely movable joints.

Diarthroses are freely movable joints.

Explanation:

Rheumatology may be defined as the branch of medicine that mainly deals with therapy and diagnosis of the rheumatic disease. The individual specialized in this field is known as rheumatologist.

Diarthroses joint is also known as synovial joint and lined in continuous with the periosteum of the joined bones. The synovial fluid is filled in the synovial joint. The synovial joints provide the free movable joints that allow abduction, extension and adduction of the body parts.

Thus, the correct answer is option (d).