Development of Cell Theory

Philosophy

300

Aristotle was a great philosopher and discovered philosophy.

First microscope

Jan 1, 1595

Jansen invented the first microscope, so we could see cells.

Pneumatic Chemistry

Jan 1, 1600

Jan Baptist van Helmont was the founder of the pneumatic chemistry.

Discovery of cellular composition

Jan 1, 1665

Robert Hooke discovered the cellular composition of cork and made the word cell.

Improved magnification

Jan 1, 1674

Anton van Leeuwenhoek polished lenses, which improved magnification.

Animacules

Jan 1, 1676

Anton van Leeuwenhoek discovered "animacules"

Bacteria

Jan 1, 1683

Anton van Leeuwenhoek discovered bacteria from saliva in his mouth.

Organisms

Jan 1, 1805

Lorenz Oken said that all living organisms originate from and consist of cells.

Nucleus

Jan 1, 1831

Robert Brown first noticed that plant cells all contain a nucleus.

Plant cells

Jan 1, 1838

Matthias Schleiden discovered that plants were made of cells.

Animal cells

Jan 1, 1839

Theodor Schwann discovered that animals were made of cells.

Sperm and Egg cells

Jan 1, 1840

Albrecht von Roelliker realized that sperm cells and egg cells are also cells.

Living things

Jan 1, 1855

Rudolph Virchow said that all living things came from other living things.

Diseases

Jan 1, 1881

Louis Pasteur discovered that bacteria spreads diseases.