1. The History of Cell Theory How did scientist figure out that all living things are made of cells?

2. Anton Van Leeuwenhoek 1632-1723 1 st to use a microscope to see microscopic organisms Called them “animalcules” invented microscope

3. Robert Hooke 1635-1708 Observed cork under microscope: saw tiny chambers Called these “Cells” Cell: Basic unit of life; the smallest thing that is still considered “living”

4. http://www.sugheronaturale.it/public/photogallery/cork_400x_PA021952c.jpg

5. Mathias Schleiden, Theodor Schwann, and Rudolf Virchow Schleiden(1814-1881): all plants are made of cells Schwann (1810-1882): all animals are made of cells Virchow (1821-1902): cells arise from preexisting cells

6. http://2.bp.blogspot.com/_GT9_CHpiZps/SZRFaUAOl4I/AAAAAAAAEr8/tuZ2- aZUCzQ/s400/nerve+cell.jpg http://micro.magnet.fsu.edu/primer/techniques/phasegaller y/images/humanpathology/humanbone.jpg http://biounder.kaist.ac.kr/~shy821/images/skin2stem_630x.jpg

7. Francisco Redi (1626-1698) Disproved spontaneous generation http://facstaff.gpc.edu/~mmajor/Lec%20Outlines%201913/Redi_experiment.JPG

8. Robert Koch’s Postulates (1843- 1910) To see if a “germ” causes a disease you must go through these steps… Must find “germ” in all cases of the disease Culture “germ” from patient with disease From that culture, infect new patients and get the same disease Culture from those patients and get the same “germ”

9. Cell Theory All living organisms are made of cells Cells are basic unit of all living organisms New cells made from preexisting cells

10. Types of Cells Prokaryotic –No nucleus or membrane bound organelles, –Ex: Bacteria Eukaryotic -- complex, have a nucleus & membrane bound organelles, --Ex: animal, plant, fungi, protist Organelle: specialized structures that perform a specific function