Question

Knee joint and elbow joints are examples of:

• A. Saddle joint
• B. Ball and socket joint
• C. Pivot joint
• D. Hinge joint

Answer 1

Answer: (D)

Hinge joint

• There are many joints present in the skeleton. Joint is a point of contact between two bones. The various type of joints present in the body are-

Ball and socket joint-

• Ball of one bone articulates in the socket of another bone. Head of the humerus and glenoid cavity of the pectoral girdle, femur and acetabulum, the joint between incus and stapes.
• Hinge joint-

movement is possible in one direction only. Joint of malleus and incus, knee joint, elbow joint, articulation joint of the lower jaw.

• Pivot joint-

helps in turning moments. One bone is fixed and second articulate. Atlas and axial of skull rotate with Axis vertebra

• Gliding joint-

limited movement in all directions. Radius and ulna

• Saddle joint-

It is a ball and socket like a joint but not developed fully. Metacarpals of thumb and carpels of hand.

So, the correct option is 'hinge joint'