Directional terms-anatomy: peripheral/central?

I need to describe the kneecap in as many ways possible using directional expressions. Im a little confused on peripheral/central, proximal/distal, parietal/visceral, and superficial/deep in relations to the kneecap. please help! thanks(:
The patella is located contained by the anterior midline at the junction between the distal femur and the proximal tibia/fibula. It is located subcutaneously.

Parietal/visceral would not be used, as that has to do with body cavity.

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