Solubility is not to be confused with the ability to 'dissolve' a substance, because the solution might also occur because of a chemical reaction. For example, zinc 'dissolves' (with effervescence) in hydrochloric acid as a result of a chemical reaction releasing hydrogen gas in a displacement reaction.
All three kidney, liver and lungs purify the blood. The lungs help remove carbon dioxide, the kidneys remove water-soluble waste and the liver removes fat soluble wastes and many other impurities from the blood....ref:http://www.pharmainfo.net/answers/pharmaquestion/which-organ-purifies-blood.
Vote for this answer. According to websites and reference books (including the Penguin Medical Dictionary and A Dictionary of Symptoms), the liver is the only internal organ that can regenerate itself. Vote for this answer. Actually, new medical research seems to suggest that the heart can heal itself as well.