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Hooke
CONTRIBUTION:
was the first scientist to discover the cell
DISCOVERY DESCRIPTION:
while Hooke was looking through a microscope to view a cork, he noticed the tiny pattern of small rectangles. He originally named these structures "pores", until later describing them as "cells."
ARGUMENT FOR DISPROVAL OF PREVIOUS MODEL:
Even though Hooke was the first scientist to view and name a "cell," he was not aware of its primary function. Also, he was not aware of the organelles nor nucleas. -
Leeuwenhoek
CONTRIBUTION:
was the first to witness and describe a living cell
DISCOVERY DESCRIPTION:
experienced the living cell as a protozoa (bacteria). He was able to see this because of his recent work of refining magnification in microscopes.
ARGUMENT FOR DISPROVAL OF PREVIOUS MODEL:
Hooke only witnessed a nonliving cell. Leeuwenhoek went a step further.While describing unicellular organisms, he did not realize he was looking at them, at the time. -
Dutrochet
CONTRIBUTION:
he described the cell as the fundamental element of organization.
DISCOVERY DESCRIPTION:
He made this discovery after further proving Moldenhawer & Treviranus's idea that cells were seperate, individual units
ARGUMENT FOR DISPROVAL OF PREVIOUS MODEL:
Although Dutrochet contributed to te discovery that cells do not just appear. He also based his argument soley on inferences rather than facts, this is a huge disadvantage to his research. -
Dujardin
CONTRIBUTION:
recognized the existence of unicellular orgamisms
DISCOVERY DESCRIPTION:
After looking under a microscope he discovered a single cell. he also recognized a similar substance inside all cells.
ARGUMENT FOR DISPROVAL OF PREVIOUS MODEL:
Dujardin disproved the theory of hollow cells and also went further in depth of Leuwenhoek's idea of unicellular organisms. Also, he disproved Ehrenbuerg's idea that small and large animals have the same organs. -
Scheiden
CONTRIBUTION:
discovered plants were made of cells
DISCOVERY DESCRIPTION:
recognized plant and animal cells were similar
ARGUMENT FOR DISPROVAL OF PREVIOUS MODEL:
Scheiden further proved that there are (2) different cell types: plant and animal, and although they were similar in a few ways, they are mostly different. -
Schwann
CONTRIBUTION:
discovered that all animals are composed of cells
DISCOVERY DESCRIPTION:
He further proved the idea that the cell is the fundamental element of organization.
ARGUMENT FOR DISPORVAL OF PREVIOUS MODEL:
He found that all living things (organisms)are made up of cells. -
Virchow
CONTRIBUTION:
found that all living things are made of pre-existing cells
DISCOVERY DESCRIPTION:
while experimenting with diseases, he discovered that all cells come form other cells
ARGUMENT FOR DISPROVAL OF PREVIOUS MODEL:
After Scheiden proved that there are two different types of cells, Virchow further proved that ALL living organisms have either one or the other.
