scientists and the cell theory. the cell the smallest unit that can perform all life processes cells...
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Scientists and
The Cell Theory
The CellThe smallest unit that can perform all life processesCells are the building blocks of life
The average human being is composed of around 100 Trillion individual cells!!!
It would take as many as 50 cells to cover the area of a dot on the letter “i”
Cells are the smallest unit that can perform all life processes and are the building blocks of life.A. True
B. False
Cell DiversityLots of shapes and sizes
Typical Cell
Anton van Leeuwenhoek1632 – 1723
He is known as the “Father of the microscope.”
1673: He looked at pond scum under the microscope and discovered small organisms he called animalcules or little animals (Protists)
1676: discovered bacteria
http://en.wikipedia.org/wiki/Anton_van_Leeuwenhoek
http://www.kent.k12.wa.us/staff/TimLynch/sci_class/chap09/lesson_protista/Protista_Lesson.html#Algae
Anton van Leeuwenhoek is the considered the father
of the periodic table.A. TrueB. False
He was the father of the microscopes
Robert Hooke1635 - 1703
Wrote and published “Micrographia”
Known as the “English Father of Microscopy”
Contributions:- He observed pieces of cork from the bark of a cork tree under the microscope.
- His observations led him to coin the word “cell.”
- “Cell”- means little rooms in Latin
- He compared the small boxes to the small rooms that monks lived in.
http://www-groups.dcs.st-and.ac.uk/~history/PictDisplay/Hooke.html
150-200 Year Gap???Between the Hooke/Leuwenhoek discoveries and the mid 19th century, very little cell advancements were made.
Probably due to the widely accepted, traditional belief in Spontaneous Generation.
Examples: -Mice from dirty clothes/corn husks-Maggots from rotting meat
19th Century AdvancementMuch doubt existed around Spontaneous GenerationConclusively disproved by Louis Pasteur
Pasteur: Ummm, I don’t think so!!!
+ =?
Matthias Schleiden1804 – 1881
German botanist – botany the study of plants
Discovered that all plants were made of cells
Contributed to the creation of the cell theory
http://www.britannica.com/eb/article-9066147/Mathias-Jacob-Schleiden
Theodor Schwann1810 – 1882
German zoologist – zoology the study of animals
Concluded that all animals are made of cells.
Contributed to the creation of the cell theory
http://www.nndb.com/people/357/000096069/
Rudolph Virchow1821 - 1902
German pathologist – pathology the study of disease
He is known as the “Father of Pathology.”
Discovered that all living cells come only from other living cells.
http://en.wikipedia.org/wiki/Image:Rudolf_Virchow.jpg
The Cell TheoryMajor Contributors:
Matthias SchleidenTheodor SchwannRudolph Virchow
The Cell Theory1. All living things are made of
cells.
2. Cells are the basic units of structure and function in living things.
3. Living cells come only from other living cells.
Modern Cell Theory added:
The cells contain information(DNA) which is passed on from cell to cell during cell division
All cells are basically the same in chemical composition and metabolic activities.
All basic chemical & physiological functions are carried out inside the cells.(movement, digestion,etc)
Cell activity depends on the activities of structures in the cell(organelles, nucleus, plasma membrane)
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