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== Membrana synovialis ==

[[Fasciculus:Gray299.png|thumb|Superficies membranae internae (rubre) vocatur membrana synovialis.]]

Membrana synovialis est [[tela (biologia)|tela]] - sensu strictu - superficei membranae internae ("''intima''"), quae [[Liquor synovialis|liquorem synovialem]] secernit. Illa ex cellulis [[macrophagus|macrophago]] (cellula typi A) similibus ac [[fibroblastus|fibroblastis]] (cellulis typi B) constituta est<ref>{{cite journal |authors=Barland P, Novikoff AB, Hamerman D |title=Electron microscopy of the human synovial membrane |journal=J Cell Biol |year=1962 |volume=14 |pages=207-20 |url=https://www.ncbi.nlm.nih.gov/pubmed/13865038}}</ref>. Quadrans cellularum sunt macrophagorum, dodrans fibroblastorum, posterioribus enim cellularum functio secretionis [[acidum hyaluronicum|acidi hyaluronici]]<ref>{{cite journal |authors=Mustonen AM, Nieminen P, Joukainen A, Jaroma A, Kääriäinen T, Kröger H, Lázaro-Ibáñez E, Siljander PR, Kärjä V, Härkönen K, Koistinen A, Rilla K |title=First in vivo detection and characterization of hyaluronan-coated extracellular vesicles in human synovial fluid |journal=J Orthop Res |year=2016 |volume=34 |issue=11 |pages=1960-8 |url=https://www.ncbi.nlm.nih.gov/pubmed/26919117}}</ref> ad [[articulus|articulationem]] lubricandam praestant. Macrophagi invicem [[leucocytus|leucocyti]] pars [[systema immunitatis|systematis immunitatis]] sunt. Nimirum morbis articuli causa vero relatio inter cellulas typi A et B graviter mutet cum incremento numeri macrophagorum. Praeterea fibroblasti transformationem patiantur, ut cellulis inflammatoriis cognoscantur, quo fiat, ut inflammatio chronica oriatur.