Hooke observed that cork is composed of small, hollow compartments.
The parts prompted Hooke to think of small rooms (cells) in a monastery, so he gave them the same name: CELLS.
Investigated cork through experimenting with the compound microscope and came up with the name cells!
Key Note: Hooke discovered the cell in 1665, which started formulating the cell theory!
Hooke’s Investigation/experiment
Hooke’s Observations
Hooke’s Microscope
Anton van Leeuwenhoek
Dutch Tradesman
Study new approaches for creating lenses to observe cloth.
Leeuwenhoek’s microscope was more powerful than Hooke’s compound microscope.
From investigating and experimenting with his microscope, Leeuwenhoek became one of the first scientists to refer to living cells when he observed an abundant number of single-celled organisms, which he called animalcules (plant & animal), swimming in a drop of pond water!
Fascinated with plant cells, Schleiden used the compound microscope and studied plant cells.
From investigating and experimenting with plants, projected plant parts are made of cells!
Discussed what he observed with his dear friend, German scientist Theodor Schwann.
Theodor Schwann
German Scientist
Studied plant & animal cells, and was intrigued by the similarities between the two.
From investigating and experimenting with plant & animal cells, Schwann was able to determine that all animals are made of cells!
Schwann published the 1st statement of the cell theory: all living things are made of cells and cell products!
Rudolf Virchow
Based on his investigations and experiments, he stated that all cells come from preexisting cells, which is the 2nd part of the cell theory: all existing cells are produced by other living cells!
