Knee anatomy - the bones from the side

 

From the side of the knee one can better appreciate the position of the patella (kneecap) in relation to the underlying femur.

knee bones from the side - femur, tibia, patella, fibula man showing position of knee bones from the side


X-ray of knee bones from the side

 

The position of the patella relative to the groove in the cartilage surface of the femur changes as the knee is bent. In the straight knee it lies above the groove and can be wiggled from side to side. As the knee is bent it enters the groove of the femur and becomes stable.

The fibula is on the lateral (outer) side and does not communicate directly with the knee joint.