Cell Theory Flashcards
Who examined a large number of plants in 1838?
Matthias Schleiden
What did Matthias Schleiden observe about plants?
All plants are composed of different kinds of cells
In what year did Matthias Schleiden make his observations about plant cells?
1838
What is the significance of Matthias Schleiden’s observations?
It contributed to the understanding that tissues of the plant are made up of cells
Who studied different types of animal cells in 1839?
Schwann, a British Zoologist.
What is the thin outer layer of cells known as?
The plasma membrane.
What unique character did Schwann identify in plant cells?
The presence of a cell wall.
What hypothesis did Schwann propose?
That the bodies of animals and plants are composed of cells and products of cells.
Who formulated the cell theory together?
Schleiden and Schwann.
What did the original cell theory not explain?
How new cells were formed.
Who first explained that cells divide?
Rudolf Virchow in 1855.
What is the phrase associated with Virchow’s explanation of cell division?
Omnis cellula-e cellula.
What are the two main points of the cell theory as understood today?
- All living organisms are composed of cells and products of cells. 2. All cells arise from pre-existing cells.
