-
Hooke discovers the cell.
The cell was discovered by Robert Hooke in 1665. He examined very thin slices of cork and saw a multitude of tiny pores that he remarked looked like the walled compartments a monk would live in. Because of this association, Hooke called them cells, the name they still bear. However, Hooke did not know their real structure or function." He used a mircoscope to few the composition of the cells. "His cell observations gave no indication of any organelles found in most living cells.(preciden) -
Anton van Leeuwenhoek
Anton van Leeuwenhoek made lenses that gave magnifications up to 270x diameters, the finest known at that time. These lenses led to the building of Anton Van Leeuwenhoek’s microscopes considered the first practical microscopes, and the biological discoveries for which he is famous. Anton Van Leeuwenhoek was the first to see and describe bacterial (1674), yeast plants, the teeming life in a drop of water, and the circulation of blood corpuscles in capillaries, (preciden). -
Dutrochet
He investigated and described osmosis, respiration, embryology, and the effect of light on plants. He has been given credit for discovering cell biology and cells in plants and the actual discovery of the process of osmosis, (wiki), Method of discovery: using a microscope to observe agents passing through cell membrane. Disproved the previous model which did not include osmosis and diffusion. -
Dujardin
"Dujardin based on his studies of organisms under a microscope proposed that many living organisms are composed of a single cell and also observed the presence of internal substance in all living cells. Dujardin disproved Ehrenberg's theory which states that 'tiny animals have the same organs as large ones,' ... He was first to group single-cell animals" which what we now call protozoans," (tutorvista). -
Schleiden
He stated that the different parts of the plant organism are composed of cells. Thus, Schleiden and Schwann became the first to formulate what was then an informal belief as a principle of biology equal in importance to the atomic theory of chemistry. He also recognized the importance of the cell nucleus, and sensed its connection with cell division, (preciden). Method of discovery: microscope. -
Schwann
Schwann declared that all living things are made of cells and cell products. This became cell theory. "Schwann proved the cellular origin and development of the most highly differentiated tissues [using a microscope, other tools, and chemistry]. Schwann established a basic principle of embryology by observing that the ovum is a single cell that eventually develops into a complete organism. Schwann's theory and observations became the foundation of modern histology." -
Virchow
"Virchow encapsulated in the epigram Omnis cellula e cellula, id est, All cells (come) from cells, which he published in 1855. It is a rejection of the concept of spontaneous generation, which held that organisms could arise from nonliving matter," (wiki), These findings are similar to Francesco Redi's. Method of discovery: microscope.