Which joint is an example of a plane joint?

Which joint is an example of a plane joint?

• A. Humerus and ulna
• B. Radius and scaphoid
• C. Carpals and tarsals
• D. Femur and pelvis

Answer: (C)

Plane joints are formed where flat surfaces of bones slide past one another, allowing only a gliding, or sliding, movement. This kind of joint is found between the small bones that make up the wrist (carpal bones) and between the bones of the ankle (tarsal bones), where the surfaces are relatively flat and the movement is a small, sliding shift rather than bending or spinning. So, the option referring to joints between carpals and between tarsals fits this description best, making it the example of a plane joint. The elbow between the humerus and ulna is a hinge joint, allowing bending and straightening. The radius–carpal arrangement relates to a condyloid joint, which permits a wider range of motion than a plane joint. The hip joint between the femur and pelvis is a ball-and-socket joint, offering rotation in multiple directions.

Plane joints are formed where flat surfaces of bones slide past one another, allowing only a gliding, or sliding, movement. This kind of joint is found between the small bones that make up the wrist (carpal bones) and between the bones of the ankle (tarsal bones), where the surfaces are relatively flat and the movement is a small, sliding shift rather than bending or spinning.

So, the option referring to joints between carpals and between tarsals fits this description best, making it the example of a plane joint. The elbow between the humerus and ulna is a hinge joint, allowing bending and straightening. The radius–carpal arrangement relates to a condyloid joint, which permits a wider range of motion than a plane joint. The hip joint between the femur and pelvis is a ball-and-socket joint, offering rotation in multiple directions.