Along with articular cartilage, another important component of synovial joints, and where they get their name from, is the synovium, which along with the surface of the articular cartilage, forms the inner lining of the joint space.

和关节软一样，关节另一重要组成成分，所以得名“关节”；分布在关节软表面，形成关节腔内层。

As " type A" cells in the synovium attempt to remove the debris, immune cells like lymphocytes and macrophages are recruited into the synovial membrane, which produces proinflammatory cytokines that ultimately cause inflammation of the synovium as well, called synovitis.

上A型细胞努力清除这些碎时，免疫细胞（如淋巴细胞、巨噬细胞）也被募集进入，产生炎症因子，最终导致炎。

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.

由松散结缔组织、血管、淋巴管组成；在表面，A型细胞清理细胞碎屑，B型细胞产生液成分，液能够润两块关节表面。