Sleep has all kinds of important neurological benefits like clearing out dead cells, managing your immune system, regulating your metabolism and storing memories.

睡眠系统有很多重要的好处，比如清除死亡细胞，管理免疫系统，调新陈代谢和储存记忆。

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.

滑膜由松散结缔织、血管、淋巴管；滑膜表面，A型细胞清理细胞碎屑，B型细胞产生滑液分，滑液能够润滑两块关的表面。