Why did it take scientists 200 years to develop the cell theory?

They didn’t have a good enough microscope to see the cells fully. So they had to wait until a better microscope was invented, that they could see all the parts of the cells and how they truly worked

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.