Cell Theory

Spontanious Generation

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Spontaneous GenerationThe theory of spontaneous generation is that living organisms may be produced fom nonliving matter.

first microscope invented

Nov 11, 1590

first microscopeJansen invented the first microscope.

theory that plants grew by eating soil

Nov 11, 1634

theory plants grew by eating soilis best known for a single expiriment stating that the weight a plant gains during growth is due to the absorption to an equal amount of soil.

Hooke described ‘cells’ in cork.

Nov 11, 1655

cells discovered in slice of corkWhen Hooke viewed a thin cutting of cork he discovered empty spaces contained by walls, and called them cells.

first time for bacteria to be described

Nov 11, 1674

bacteria describedAnton Van Leeuwenhoek was the first to see and describe bacteria.

cell nucleus in cells of the orchid

Nov 11, 1833

cell nucleus in the cell of an orchidBrown descibed the cell nucleus in cells of the orchid.

Cell Theory~plants

Nov 11, 1837

plants_cell theorySchlieden investigated plants microscopically and conceived that plants were made up of cells.

plant and animal cells

Nov 11, 1838

plant and animal cellsCells form by free-cell fromation similar to the formation of crystals (spontaneous generation).

helped come up with the cell theory

Nov 11, 1839

cell theoryIn 1839, he extended Schleiden's cell theory to animals, stating that all living things are composed of cells.

sperm cells and egg cells

Nov 11, 1840

sperm cells and egg cells are found to also be cellsAlbrecht von Roelliker realized that sperm cells and egg cells are also cells.

expands conclusion that cells develop from existing cells

Nov 11, 1858

expands thought that cells develop from existing cells1858 Rudolf Virchow expounds his famous conclusion: that is cells develop only from existing cells.

theory bacteria came from the environment

Nov 11, 1864

theory bacteria comes from the environmentPasteur then formed experiments to find where these bacteria came from, and was able to prove that they were introduced from the environment.