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Hooke Cell Theory
Robert Hooke was an English scientist who discovered a honeycomb-like structure in a cork slice using a primitive compound microscope. He could only see dead tissue which was the cell wall. He coined the term "cell" for all the components he saw. -
Leeuwenhoek Cell Theory
Anton van Leeuwenhoek made more discoveries since he made his first discovery in 1870 when he looked at a pond with a microscope, but on a microscopic level. He eventually published a letter to the Royal Society.In these letters contained detailed pictures of what he saw. Among these new drawings was the first protozoa and bacteria discovered. -
Brown Cell Theory
Robert Brown was the first to discover the nucleus of a plant cell. The discovery was made when he studied the aspects of a plant's life, from how plants grow to how their cells work together. This added on to previous cell theories. -
Schleidon Cell Theory
Matthias Jakob Schleiden studied plant structures under a microscope. He wrote Contributions to Phytogenesis while a professor at University of Gena. This stated that different parts of the plants were composed of cells. He also recognized the importance of the cell nucleus, discovered in 1831 by Robert Brown. -
Schwann Cell Theory
Theodor Schwann reached the conclusion that both plants and animal tissue are compsed of cells This ended arquments that plants and animals were fundamentally different in structure. He also pulled together and organized previous statement on cells into one theory, which states: 1) Cells are organisms and all organisms consist of one or more cells 2) The cell is the basic unit of structure for all organisms. -
Virchow Cell Theory
Rudolf Virchow added a third part to the cell theory. He observed that all cells develop from already existing cells. He was also the first to state that diseased cells came from healthy cells.
