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.

和关软一样，滑膜是滑膜关的另一重要组成成分，所以得名“滑膜关”；滑膜分布在关软的表面，形成关腔的内层。

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.

滑膜上的A型细努力清除这些碎片的同时，免疫细（巴细、巨噬细）也被募集进入滑膜，产生炎症因子，最终导致滑膜炎。

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.

滑膜由松散结缔组织、血管、巴管组成；在滑膜表面，A型细清理细碎屑，B型细产生滑液成分，滑液能够润滑两块关的表面。