Download History of Cell Theory

Survey
yes no Was this document useful for you?
   Thank you for your participation!

* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project

Document related concepts

Polycomb Group Proteins and Cancer wikipedia , lookup

Vectors in gene therapy wikipedia , lookup

NEDD9 wikipedia , lookup

Transcript
History of Cell Theory
G.Burgess
Updated 2010.
History of the Microscope

First invented; 1590, Hans and Zacharias Janssen
(originally 3X to 9X), Dutch eye glass makers

Anton Van Leeuwenhoek, 1632-1723, designed the
best simple microscopes of the time, first person to
describe bacteria and protozoans
Discovery of the Cell



1665: Robert Hooke, English scientist, described the spaces in cork as
cells. He first coined the term cell
1674: Anton Van Leeuwenhoek, Holland, first describes protozoans
1824: Henry Dutrochet, France, proposed that all living things were
composed of cells and discovered that plants grew by increasing their
number of cells.
Discovery of the Cell



1831, Robert Brown, Scotland, described the nucleus as a small-rounddense body common to all plant cells.
**1838, Matthais Schleiden, Germany, after a lengthy study concluded
that all plants are made of cells.
**1839, Theodor Schwann, Germany, concluded that all animals are
made of cells.
Discovery of the Cell
 1839, Johannes Purkinje, Czech Republic, used the term
‘protoplasm’ in reference to the jelly-like material with in a cell.
 1858, Rudolph Virchow, Germany, stated that all cells come from
other living cells.
Cell Theory

All organisms are made of cells or cell fragments

The cell is the basic unit of structure and function in organisms.

Cells are produced from other living cells
Continued Discoveries
1857: Kolliker, described the mitochondria
1869: Miescher isolated DNA for the first time.
1879: Flemming described chromosome behavior during
mitosis.
1898: Golgi described the golgi apparatus.
1953: Crick, Wilkins and Watson proposed structure of DNA
double-helix.