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Palette The knee joint is the junction of three bones-the femur (thigh bone or upper leg bone), the tibia (shin bone or larger bone of the lower leg), and the patella (kneecap). The patella is about 2 to 3 inches wide and 3 to 4 inches long. It sits over the other bones at the front of the knee joint and slides when the leg moves. It protects the knee and gives leverage to muscles.
The knee as a whole is more a joint.

The knee cap is called a patella (bone).

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7y ago

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