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Cell Theory And Scientists

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Cell Theory And Scientists

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September 22, 2024
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2024/2025
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CELL THEORY SCIENTISTS
Modern Cell Theory Robert Hooke
Modern Cell Theory contains 4 statements, in addition  observed cells in cork
to the original Cell Theory:  coined the term “cells”
 The cell contains hereditary information  described cells as “tiny holes” or
(DNA) which is passed on from cell to cell “honeycomb”
during cell division  thought cells existed only in plants and fungi
 All cells are basically the same gin chemical
composition and metabolic activities Anton van Leuwenhoek
 All basic chemical & physiological functions  used a handmade microscope to observe pond
are carried out inside the cells (movement, scum & discovered single-cell organisms
digestion, etc.)  called them “animalcules”
 Cell activity depends on the activities of sub-  observed blood cells from fish, birds, frogs,
cellular structures within the cell ( organelles, dogs, and humans
nucleus, plasma, membrane)  it was known then that cells are found in
animals as well as plants
The 3 Basic Components of the Cell Theory were Robert Brown
now complete:  noticed pollen grains in water jiggled
 All organisms are composed of one or more  called “Brownian Motion”
cells (Schleiden & Schwann)  discovered Nucleus
 The cell is the basic unit of life in all living  discovered nuclei within the cells, pave the
things (Schleiden & Schwann) way to discover other nuclear components,
 All cells are produced by the division of pre- chromosomes & DNA
existing cells (Virchow 1858)
Felix Dujardin
How Has The Cell Theory Been Used?  described a formless substance, sarcode –
The basic discovered truths about cells, listed in the protoplasm
Cell Theory, are the basics for things such as:
Disease/Health/Medical Research and Curses (AIDS, Matthias Schleiden
Cancer, Vaccines, Cloning, Stem Cell Research, etc.)
 botanist
 concluded that “all plants are made of cells”

Theodor Schwann
 zoologist
 concluded that “all animals are made of cells”

Rudolph Virchow
 physician
 did research on cancer cells
 concluded “Omnis cellula e cellula” / “All
cells are from other pre-existing cells”
 cells must arise from pre-existing cells
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