Types of synovial joint
A1    Ball-and-socket (spheroidal) joint mechanism
A2    Shoulder joint
B1    Hinge joint (ginglymus) mechanism
B2    Elbow joint
C1    Saddle (sellar) joint mechanism
C2    Carpometacarpal joint of thumb
D1    Ellipsoid joint mechanism
D2    Wrist (radiocarpal) joint
E1    Pivot (trochoid) joint mechanism
E2    Median atlanto-axial joint
F1    Plane (gliding) joint mechanism
F2    Intercarpal joints