The joint cavity containing oily and slippery fluid called synovial is called synovial joint. It is 7 types. namely-
(i) Pivot (atlas joint)
(ii) Hinge joint (elbow joint)
(iii) Ball and Cotoral Joints (Skandha/Femur Joints)
(iv) Flat joint (Carpal joint)
(v) Saddle (metacarpal joint)
(vi) Ellipsoid Joint (Carpal Joint)