Question

identify the types of structural and functional joints numbered (4, 5, 6) in these illustrations by categorizing the labels to the correct location. (some labels will be used more than once; some labels will not be used)
hinge
diarthrosis
synarthrosis
pivot
synovial
amphiarthrosis
plane
classifications
structural 4 functional 4 structural 5 functional 5 structural 6 functional 6

Explanation:

• Joint 4 (carpals): Structurally, it is a synovial joint as it has a synovial cavity. Functionally, it is a diarthrosis (freely movable joint).
• Joint 5 (elbow - humerus - ulna): Structurally, it is a synovial joint (has synovial fluid, joint capsule etc.). Functionally, it is a diarthrosis. Also, the elbow joint is a hinge joint (a type of synovial joint) structurally.
• Joint 6 (atlas - axis): Structurally, it is a synovial joint (pivot type of synovial joint). Functionally, it is a diarthrosis.

Answer:

Structural 4: Synovial; Functional 4: Diarthrosis; Structural 5: Hinge (Synovial); Functional 5: Diarthrosis; Structural 6: Pivot (Synovial); Functional 6: Diarthrosis