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Zacharias Jansen
He created the first microscope in 1590. He contributed to the cell theory by making it easier and more practical to observe cells. -
Jan Baptist van Helmont
Found plants grow from water, but thought plants grew from eating soil. -
Robert Hooke
Discovered cells while looking at a piece of cork. He saw tiny "pores" that he thought could have been from the tree when it was alive. -
Anton van Leeuwenoek
First to observe bacteria and protozoa. He discovered single-celled oranisms that he called animalcules. He contributed to the cell theory by discovering organisms with one cell. -
Lorenz Oken
Came up with a new system of animal classification tat demonstrates the path of evolution. -
Robert Brown
Recognized the general occurence of the nucleus in cells. Also introduced the word nucleus. -
Matthias Schleiden
He helped contribute to the cell theory by publishing a book about leaves being composed by cells. -
Theodor Schwann
He proved the cellular origin and development of most highly differentiated tissues including nails, feathers, and tooth enamel. -
Albrecht von Roelliker
Claimed research on the nervous system, connection between nerve fibers and cell bodies and there all attached. -
Louis Pasteur
Contributed to cell theory by disproving spontaneous generation. First scientist to prove that cells can only form from pre-existing cells. -
Rudolf Virchow
First to recognize leukemia cells and one of the first to accept and plagarize te work of Robert Remak. Contributed to the cell theory by publishing the book title "Every Cell Originates From Another Existing Cell Like It." -
Aristole
He was drawn to animal classification to try and connect the human soul to the human body. This classification classified animals by how complex their inner organs and systems were.
