Also, fibrillations form, essentially these cracks or clefts, on what used to be a smooth articular surface.

软骨纤维性颤动也将形成，其本质是这些原本十分光滑的软骨表面出现裂缝或裂口。

The synovium's composed of loose connective tissue, blood vessels, lymphatic vessels, and on the surface—" Type A" cells that clear cellular debris and " Type B" cells that produce components of synovial fluid, which helps lubricate the two articular surfaces.

滑膜由松散结缔组织、血管、淋巴管组成；在滑膜表面，A型细胞清理细胞碎屑，B型细胞产生滑液成分，滑液能够润滑两块关节的表面。