BIODERM

Discovered cells while looking at a thin slice of cork

Used handmade microscope; animalcules

To visualize cells too small too see with the naked eye

The ratio of an objects image size to its real size

Measure of the clarity of the image

Visible difference in parts of the scope

Used to study subcellular structures

Provides images that look 3D

Studies the internal structure of cells

Concluded that all plants are made of cells

Stated that all animal tissues are composed of cells

Concluded that cells must arise from pre-existing cells