Patella
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Patella_ant.jpg
Patella_ant.jpg
Left patella - anterior aspect
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Patella_post.jpg
Patella_post.jpg
Left patella - posterior aspect
The patella or kneecap is a thick, triangular bone which articulates with the femur and covers and protects the front of the knee joint. It develops from the tendon of the Quadriceps femoris muscle, which contracts to straighten the leg. The patella increases the leverage that the tendon can exert on the femur by increasing the angle at which it acts.