Early Scientists
Anton van Leeuwenhoek Discovers single-celled, animal-like organisms, now called protozoans. (1683) First compound light microscope
Robert Hooke Coined the term “cell” (1665)
Matthias Schlieden All plants are made of cells (1838)
Theodor Schwann All animals are made of cells (1839)
Rudolf Virchow Cells can only arise from pre-existing cells (1855)
Cell Theory All organisms are made of cells. All cells arise from pre-existing cells. The cell is the most basic unit of life.
Spontaneous Generation? Francesco Redi Italian doctor who proved maggots came from flies (1668)
Germ Theory of Disease Microscopic organisms cause diseases. Frenchman Louis Pasteur
Why do we care today?