When the heart poses a problem an artificial heart may be used to replace it; when the lungs cease to function normally, man-made lungs may be used instead. But when the liver, a highly sophisticated "factory," breaks down, there's nothing that can take its place. This is also the reason why liver ailments especially render the medical world powerless.
心臟出問題，可以裝置人工心臟；肺臟功能失常，也有人工肺瓜代；但肝這麼一座精奧難解的「工廠」一旦損壞，卻沒有任何東西可以替代，這也就是為什麼肝病特別令醫學界束手無策的原因。