GENERAL HISTOLOGY

Detailed explanation-1: -Ball-and-socket joints possess a rounded, ball-like end of one bone fitting into a cuplike socket of another bone. This organization allows the greatest range of motion, as all movement types are possible in all directions. Examples of ball-and-socket joints are the shoulder and hip joints (Figure 19.32).

Detailed explanation-2: -In a hinge joint, the convex end of one bone articulates with the concave end of the adjoining bone (see Figure 9.4. 3b). This type of joint allows only for bending and straightening motions along a single axis, and thus hinge joints are functionally classified as uniaxial joints.

Detailed explanation-3: -There are three types of biaxial joint: condyloid, ellipsoid and saddle. In a condyloid joint a convex condylar surface articulates with a concave condylar surface. The metacarpophalangeal joints are condyloid joints.

Detailed explanation-4: -Condyloid ( ellipsoidal ) Joints: Biaxial joints, The oval articular surface of one bone fits into a complementary depression in another . The important characteristic is that both articulating surfaces are oval.