Invented compound optical microscope
Made it easier to observe cells
Discovered honeycomb-like structure in cork
Coined the term "cell"
Observed living bacteria & blood cells
Known as the Father of Microbiology
Discovered plant were made of cells
Believed plant growth happened throughout production of cells
Stated "all animals were made of cells"
Believed plant & animal cells were different in structure, but "all cells are the basic unit of life"
Stated "cells can only arise from pre-existing cells"
Stated that diseases caused change in normal cells