<P> Schleiden 's theory of free cell formation through crystallization was refuted in the 1850s by Robert Remak , Rudolf Virchow , and Albert Kolliker . In 1855 , Rudolf Virchow added the third tenet to cell theory . In Latin , this tenet states Omnis cellula e cellula . This translated to : </P>
<P> Schleiden 's theory of free cell formation through crystallization was refuted in the 1850s by Robert Remak , Rudolf Virchow , and Albert Kolliker . In 1855 , Rudolf Virchow added the third tenet to cell theory . In Latin , this tenet states Omnis cellula e cellula . This translated to : </P>
who concluded that all cells came from existing cells
who concluded that all cells came from existing cells
Rudolf Virchow
Rudolf Virchow