-
Robert C. Hooke
1665 - English scientist that cut a thin slice of cork and looked at it under his microscope. To him, the cork seemed to be made up of empty little boxes, which he called cells. First to use the word "cell".
Cite sources:
"Discovery of Cells and the Developmwnt of Cell Theory." Discovery of Cells and the Developmwnt of Cell Theory. N.p., n.d. Web. 03 Oct. 2016. http://www.smithlifescience.com/celltheory.htm. -
Anton Van Leeuwenhoek
1670 - Leeuwenhoek described cells in a drop of pond water using a microscope. He was the first person to observe bacteria and single- celled animals (protozoa). Leeuwenhoek was the first person, using a microscope, to observe and describe red blood cells in humans, animals, and sperm cells.He studied the structure of plants, the eyes of insects, and life cycles of fleas, aphids, and ants. -
Robert Brown
English Botanist Robert Brown discovered the nucleus in plant cells.
Brown contributed to cell theory by showing the radical motion of molecules in a cell under the light of a microscope. The Brownian method was named after Brown's discovery of the way that the molecules moved.
"Robert Hooke (1635-1703) Antoni Van Leeuwenhoek (1632-1723)." - Ppt Descargar. N.p., n.d. Web. 06 Oct. 2016. http://slideplayer.es/slide/163835/. -
Matthias Jakob Schleiden
Schleiden discovered that all plant tissues are composed of cells and that an embryonic plant arose from a single cell.He stated that the cell is the basic "building block" of all plant matter. Schleiden discovered the production of new cells. His conception of the cell as the common structural unit of plants effected the shift of scientific attention to living processes. Schleiden published his cell theory on plants,Schwann extended it to animals, together under one unifying theory. -
Theodor Schwann
Schwann reached the same conclusion as Schleiden about animal tissue being made of cells. He described cellular structures in animal cartilage as rigid extracellular matrix. He came up with a theory that stated: Cells are organisms and all organisms consist of one or more cells. The cell is the basic unit of structure for all organisms. In other words, the cell is the basic unit of life. This statement became known as the cell theory. -
Rudolf Virchow
Taking Brown's original description of nuclei, Virchow added a third principle to the cell theory: all cells develop only from existing cells.Virchow was the first to demonstrate that the cell theory applies to diseased tissue and to healthy tissue-that is, that diseased cells derive from the healthy cells of normal tissue. He is best known for his text Cellular Pathology as Based on Histology (1850-1860).
N.p., n.d. Web. 06 Oct. 2016. http://imgarcade.com/1/rudolf-virchow-cell-theory/.
