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Cellular Biology: The Cell Theory Cell theory was developed by many scientists sharing their discoveries Zacharias-1650.. Antonie Van Leeuwenhoek- 1670 o Discovered animalcules Robert Hooke- 1660- coined the term cell Henri Dutrochet- 1820- parts of organisms are composed of cells Robert Brown- 1830 – discovered the cell nucleus Felix Dujarin- 1835- Described cells as full or jelly- like fluid (cytoplasm People creditied for discovering the cell theory o Mathias Schleiden- 1838- german botanist that concluded that all plants and plant parts are composed of cells o Theodore Schwann- 1838- german zoologist who concluded all animals and animal parts are composed of cells o Rudolph Virchow- 1858- german physician who concluded all cells must come from other cells CELL THEORY: o 1. All living things are composed of cells o Cells are the basic unit of life o All cells come from pre- existing cells Related Discoveries: o Cytoplasm- (1835) – jelly- like substance that is within a cell (it is not full or empty space) o Within the cytoplasm there are small membrane bound organelles that perform specific functions within a cell Two types of cells are identified. They were termed Prokaryotic and Eukaryotic