discussing liver and blood testis barrier:we know some cells have duplicated nucleus like liver or muscle cells.but some of us know the liver cells nucleus have 4n,8n.12n e.g chromosomes.we think their nucleus have 2n chromosomes(46) but that is not.you know sperm has n(23) chromosomes and that is advocated that blood testis barrier is protecting sperms from immun system cells.ıf ıt is like that wyh there isn't a system protecting hepatocytes from immun system cells and when we research we see there are fenestreated capilleries not continous capilleries between hepatic cords.the hepatocytes are close to blood for this reason ı think the purpose of blood testis barrier must be for differen cause.