1. Da cell theory
By someone

2. Components of the Cell Theory
Cells are made from pre existing cells
All Living things are made up from one or more cells.
Cells are the basic structure of everything.

3. Anton van Leeuwenhoek
Anton made his own microscope and started observing many other things such as teeth. This helped him discover bacteria.

4. Robert Hooke
Whilst studying physics and looking for a microscope, he named his observations ‘cells’ as they looked like cells monks would pray in. This is where the words cell originates from.

5. Matthias Schleiden
He studied plants and found that they were all made of cells.