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quote:Originally posted by Karen W.Do we actually shed our stomach Lining like our skin leaving the new skin on the inside?
quote:Originally posted by lightarrowI heard that, even if liver cells can regrow easily, the organ as a whole doesn't recreate its perfect inner structure, so, if the damage is quite large, regrowing doesn't solve the problem. Is it true?
quote:The liver is among the few internal human organs capable of natural regeneration of lost tissue; as little as 25% of remaining liver can regenerate into a whole liver again. This is predominantly due to the hepatocytes acting as unipotential stem cells (i.e. a single hepatocyte can divide into two hepatocyte daughter cells). There is also some evidence of bipotential stem cells, called oval cells, which can differentiate into either hepatocytes or cholangiocytes (cells that line the bile ducts). Living donor liver transplantation is a technique in which a portion of a living person's liver is removed and used to replace the entire liver of the recipient. This was first performed in 1989 for pediatric liver transplantation. Only 20% of an adult's liver (Couinaud segments 2 and 3) is needed to serve as a liver allograft for an infant or small child. More recently, adult-to-adult liver transplantation has been done using the donor's right hepatic lobe which amounts to 60% of the liver. Due to the ability of the liver to regenerate, both the donor and recipient end up with normal liver function if all goes well. This procedure is more controversial as it entails performing a much larger operation on the donor, and indeed there have been at least two donor deaths out of the first several hundred cases. A recent publication has adressed the problem of donor mortality, and at least 14 cases has been found. The risk of postoperative complications (and death) is far greater in right sided hepatectomy than left sided operations
quote:Originally posted by lightarrowAbout brain and other organs which cells don't reproduce, however, I remember that all their inner components are changed in (maximum) a few months; so, we become new a lot of times in our lifes.
quote:Originally posted by neilepWe all shed skin....you're doing it now !...watch out !!..there's goes a flake....How long does it take for ME to be fully replenished.
quote:Originally posted by ScouseLadHave any of you got any scars???why dont they disappear if the skin that we get the scars on isnt their anymore...I guess scars fade... like tatto's.. But why dont they disappear completely?