In the control groups the synovial lining cells were one to three layers without infiltration vascular proliferation and the articular cartilage layer was much thicker the surface was smooth and the joint space was normal .

对照组 滑膜由1～3层 扁平滑膜细胞 及滑膜下层 组成，无炎细胞浸润及血管增生，关节软骨 层较厚，表面光滑，关节间隙正常。

Synovial metaplasia was present in the inner layer of fibrous capsule .

纤维囊 内层出现的 滑膜化生是一种生物适应现象，追溯 滑膜与纤维 内层之成纤维 细胞都 起源于 间充质细胞，在生物适应过程中发展为 滑膜 细胞。

It is ably assisted by the synovial fluid which is produced by the synovium the aforementioned rubbery layer .

这是干练的协助下，由 滑液这是所产生的滑膜，上述胶状 层。