Patella of age. Due to the great stress on the patellofemoral joint during resisted knee flexion, the articular cartilage of the patella is among the thickest in the human body. The lower part of the posterior surface has vascular canaliculi filled and is filled by fatty tissue, the infrapatellar fat pad. Emarginations (i.e. "patella emarginata", a "missing piece") are common laterally on the proximal edge. Bipartite patellas are the result of an ossification of a second cartilaginous layer at the location of an emargination. Previously, bipartite patellas were explained as the failure of several ossification centres to fuse, but this idea
The Body (Buffy the Vampire Slayer) to mortality and human connections, is childlike in her innocence and questions. Xander's anger and Anya's confusion allow them to be mothered somewhat by Willow, who needs to take care of someone. Dawn is deeply in denial, unable to understand that the woman she thought she had known all her life was gone. Tara, who has gone through the ordeal before, represents the acceptance phase, soothing and helping the others to work through what they are experiencing. Buffy toward the end also begins to see acceptance when she tells Dawn that the body in the morgue is not their mother;