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Robert Hooke
Hooke used the microscopes of his time to observe cork cells. He only saw the cell walls though because these were already dead cells. They looked like tiny rooms a monk would live in and because of this, he named them cells, the name they still bear today. He had no idea of the cell parts or how it functioned at all. -
Antonie Leeuwenhoek
Leeuwenhoek was the first to discover bacteria and protozoa (single celled organisms) in pond water under his hand made microscopes. He was also the first person to observe red blood cells and sperm cells in humans and other animals. The cells he observed were the first living cells observed. -
Robert Brown
Brown was the first to observe the nucleus in plant cells. -
Matthias Schleiden
Schleiden declared that the cell is the basic building block for all plant life. He speculated that the production of new cells come from the nuclei of the old cells. -
Theodor Schwann
Schwann concluded that not only plant tissue was made up of cells but also animal tissue too and that they were fundamentally different in structure. He also organized all the previous theories on the topic into one theory that states that cells are organisms and all organisms consist of one or more cells and that the cell is the basic unit of structure for all organisms. -
Rudolf Virchow
Virchow declared that all cells develop from existing cells and he proposed that diseased cells come from healthy cells. -
Work cited
"Cell Theory Timeline." Cell Theory Timeline. N.p., n.d. Web. 06 Oct. 2016.
"Discovery of Cells and the Developmwnt of Cell Theory." Discovery of Cells and the Developmwnt of Cell Theory. N.p., n.d. Web. 06 Oct. 2016.
"Zacharias Janssen." Contributions To Cell Theory Timeline. N.p., n.d. Web. 06 Oct. 2016.