Which bone forms part of the knee joint along with the femur and tibia?

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Multiple Choice

Which bone forms part of the knee joint along with the femur and tibia?

Explanation:
The knee joint involves not just the femur and tibia, but also a small bone that sits in front of the joint—the patella. The patella, or kneecap, is a sesamoid bone embedded in the quadriceps tendon and articulates with the femur in the patellofemoral joint. This setup helps with knee extension by increasing the leverage of the quadriceps and protecting the joint during movement. The fibula doesn’t form part of the knee’s main articulating surfaces (though it’s near the joint), and the radius and ulna are forearm bones, not involved in the knee.

The knee joint involves not just the femur and tibia, but also a small bone that sits in front of the joint—the patella. The patella, or kneecap, is a sesamoid bone embedded in the quadriceps tendon and articulates with the femur in the patellofemoral joint. This setup helps with knee extension by increasing the leverage of the quadriceps and protecting the joint during movement. The fibula doesn’t form part of the knee’s main articulating surfaces (though it’s near the joint), and the radius and ulna are forearm bones, not involved in the knee.

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