By: Faith Giovanini
The cell theory
Cell theory refers to the idea that cells are the basic unit of structure in every living thing. This theory is one of the foundations of biology. The theory says that new cells are formed from other existing cells, and that the cell is a fundamental unit of structure, function and organization in all living organisms.
Anton van Leeuwenhoek
Shleiden cocluded that all plants are made of cells.