What are the three parts of the cell theory? who(m) is credited with the theory?

Theodore Schwann, Matthias Jakob Schleiden, and Rudolf Virchow

1) all living things are made of one or more cells
2) cells are the basic unit of life
3) new cells come from existing cells

Ifound this on google “aristotle (384–322 bc) in western scientific taxonomy the greek philosopher aristotle was the first to classify all living things, and some of his groups are still used today, like the vertebrates and invertebrates, which he called animals with blood and without blood.” i hope this you for what your looking for.