The Cell Theory Microscopes Provide the Windows to the World of the Cell
The Cell Theory
Feb 23, 2016
The Cell Theory. Microscopes Provide the Windows to the World of the Cell. Anton Van Leeuwenhoek. ( 1600’s) Credit for the first microscope Looked at pond water and saw “wee beasties”. Robert Hooke. Observed plant stems, wood, and cork (1600’s ) He used a compound scope (series of lenses) - PowerPoint PPT Presentation
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The Cell TheoryMicroscopes Provide the Windows to the World of the Cell
Anton Van Leeuwenhoek
(1600’s)Credit for the first microscopeLooked at pond water and saw “wee beasties”
Robert HookeObserved plant stems, wood, and cork (1600’s)
He used a compound scope (series of lenses)
He was the first to use the term “cell”
What cell part did Hooke observe?
Cell Wall
Robert Brown (1833)Observed that cells had a dark structure within plant cellsBrown observed the nucleus
Matthias Schleiden (1838)Stated that all plants are made of CellsMade many observations of plants around the area
Theodor Schwann (1839)Stated that all animals are made of CellsObserved many animal tissues
Rudolf Virchow (1855)Stated that all cells come from pre-existing cellsCells arise from the division of pre-existing cells
Louis Pasteur (1859)Disproved the Theory of Spontaneous Generation
Cell TheoryCell Theory is the unifying theme in biology because it emphasizes the similarity of all living things
All organisms are composed of one or more cells.Cells are the smallest living units of all living organisms.Cells arise only by division of a previously existing cell.
Exceptions to the Cell Theory
Viruses – are not cellularMitochondria and chloroplast – each contain genetic material and can reproduce
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