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- But the cell did not become a focal unit for studying biological processes until Schleiden (1838) and Schwann (1839) advanced the cell theory according to which cells are the basic living units. The term cytology was widely used for the studies that ensued, which focused mainly on describing cells as seen under the light microscope.
plato.stanford.edu › entries › cell-biologyPhilosophy of Cell Biology - Stanford Encyclopedia of Philosophy
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Cell theory, as formulated by Theodor Schwann in 1839, implied that this relationship was a specific and lawful one, i.e. that germs of a certain kind, all else being equal, would produce adult organisms of the same kind, and vice versa. Questions of preformation and epigenesis took on a new meaning under this presupposition.
- Staffan Müller-Wille
- 2010
Recognizing the importance of Robert Brown 's discovery of the cell nucleus, Schleiden argued that the nucleus, which he renamed the cytoblast, was an essential component of all plant cells. He believed that all higher plants were aggregates of cells. The cells that made up the plant led a double life.
From the discovery of single cells by Robert Hooke and the cell theory by Schleiden and Schwann till the establishment of exfoliative cytology by George Papanicolaou and the invention of fine-needle aspiration biopsy technique by Martin and Ellis, there is a three-century continuum of important discoveries and research.
- Aristides Diamantis, Apostolos I. Beloukas, Alexandra M. Kalogeraki, Emmanouil Magiorkinis
- 2013
The first cell theory is credited to the work of Theodor Schwann and Matthias Jakob Schleiden in the 1830s. In this theory the internal contents of cells were called protoplasm and described as a jelly-like substance, sometimes called living jelly.
Oct 15, 2019 · Where Schwann understood the cell to be the fundamental unit of biological development, protoplasm theorists understood protoplasm to drive ontogeny and cells to be merely secondary structures deposited in the course of this primary substance’s development.
- William Bechtel, Andrew Bollhagen
- 2019
In the 1830s Matthais Jakob Schleiden (1804-1881) and Theodor Schwann (1810-1882) established the basic principles of modern cell theory. Cell theory allowed scientists to see the cell as the fundamental unit of life.
Mar 1, 2018 · In 1833, Schleiden joined the laboratory of Johannes Peter Müller (1801–1858) in Berlin. He sustained that organisms are made up of a society of cells and focused his attention on their origin, using embryonic plant tissue.
