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The Cell Theory

The Cell Theory. Some Random Cell Facts. The average human being is composed of around ______________________ individual cells!!! It would take as many as _________cells to cover the area of a dot on the letter “ i ” WOW!!!. Discovery of Cells.

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The Cell Theory

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  1. The Cell Theory

  2. Some Random Cell Facts • The average human being is composed of around ______________________ individual cells!!! • It would take as many as _________cells to cover the area of a dot on the letter “i” WOW!!!

  3. Discovery of Cells • _________- English Scientist, _________________________, discovered cells while looking at a thin slice of cork. • He described the cells as tiny _______________ or a honeycomb • He thought that cells only existed in plants and __________________

  4. Anton van Leeuwenhoek"layu-wen-hook" • ______________ Used a handmade microscope to observe pond scum & discovered ______________-_________________organisms • He called them “______________________________” • He also observed _______________________ cells from fish, birds, frogs, dogs, and humans • Therefore, it was known that cells are found in animals as well as_________________________

  5. 150-200 Year Gap??? • Between the Hooke/Leuwenhoek discoveries and the mid ___________ century, very little cell advancements were made. • This is probably due to the widely accepted, traditional belief in ________________________ __________________________. • Spontaneous Generation is the belief that __________________ things come from ________________________things.

  6. 19th Century Advancement Pasteur: Ummm, I don’t think so!!! • Much _______________existed around Spontaneous Generation • Conclusively ____________________by Louis Pasteur + = ?

  7. Development of Cell Theory • _____________ German Botanist, Matthias _________________, concluded that all plant parts are made of_______________ • ____________- German physiologist, Theodor _________________who was a close friend of Schleiden, stated that all _________________tissues are composed of cells.

  8. Development of Cell Theory • ____________- Rudolf _______________, German physician, after extensive study of cellular pathology, concluded that cells must arise from ____________________ cells.

  9. The Cell Theory Complete • The 3 Basic Components of the Cell Theory were now complete: • 1. All organisms are composed of ________ or _____________cells. (Schleiden & Schwann)(1838-39) • 2. The cell is the basic unit of life in all _______________things. (Schleiden & Schwann)(1838-39) • 3. All cells are produced by the __________________ of preexisting cells. (Virchow)(1858)

  10. Modern Cell Theory • Modern Cell Theory contains 4 statements, in addition to the original Cell Theory: • The cell contains hereditary information(___________) which is passed on from _____________ to _____________ during cell division. • All cells are basically the same in ________________composition and metabolic activities. • All basic chemical & physiological functions are carried out ___________________the cells.(movement, digestion,etc) • Cell activity depends on the activities of ___________________________ structures within the cell(organelles, nucleus, plasma membrane)

  11. How Has The Cell Theory Been Used? • The basic discovered truths about cells, listed in the Cell Theory, are the basis for things such as: • Disease/Health/Medical Research and Cures(AIDS, Cancer, Vaccines, Cloning, Stem Cell Research, etc.)

  12. Some Parting Thoughts • It is amazing to think that the cells that make up our bodies are just as alive as we are. Humans are just an intricately designed community of cells, which must work together to survive.

  13. This powerpoint was kindly donated to www.worldofteaching.com http://www.worldofteaching.com is home to over a thousand powerpoints submitted by teachers. This is a completely free site and requires no registration. Please visit and I hope it will help in your teaching.

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