Question

Joint between carpal and metacarpal of human thumb is an example of

• A. Hinge joint
• B. Saddle joint
• C. Gliding joint
• D. Pivot joint

Answer 1

Answer: (B)

Saddle joint

• Joints are points of contact between bones, or between bones and cartilages.
  
• Synovial joints are characterized by the presence of a fluid-filled synovial cavity between the articulating surfaces of the two bones. These joints help in locomotion and many other movements. Saddle joint is a type of synovial joint.
• The saddle joint gets its name because the bone forming one part of the joint is concave (turned inward) at one end and looks like a saddle. The other bone's end is convex (turned outward), and looks like a rider in a saddle.
  
• The joint between carpal and metacarpal of human thumb is an example of saddle joint.
  
• So, the correct answer is 'Saddle joint'.