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Period: 300 to
Timespan
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347
Accepting Spontaneous Generation
Aristotle had a hard time accepting spontaneous generation, but he didn't know what else to assume. Barnacles just appear on boats, fish jusr appear in ponds. Aristotle had supported spontanious generation -
The Frist Microscope
Zacharias JAnsen successfully made the frist microscope in 1595. -
Spontaneous Generation Support
Jan Baptist van Helmont believed spontaneous generation. He thought that dirty shirt+wheat grains+21 days=mice -
Finding Cells With MIcroscopes
Robert Hooke found the first cells and gave them their name. -
Better Than The Best (Microscopes)
Anton van Leeuwenhoek, a tradesman who discovered so much blood cells, bacteria, protis, and even sperm cells. He did something even more important though. He made a way better version of the microscope. It was so good in fact that people were still using it 100 years later. -
Another Supporter
Lorenz Oken- studies nature, was a teacher, thought he knew the significance of life. He supported spontaneous generation. He thought the skull was formed from fusion of a vertebrae. -
Naming Nucleus
Robert Brown was responsible for many things like naming the nucleus in a cell (highly important), the difference between gymno sperms and angio sperms, and using a microscope on plant fossils. -
Cell theory gets rollin'
Matthiass Schlieden found plants were made of cells, what the compostion of cells, and the importance of cell nucleus and identified it's union with cell division. Later with Theodor Schwann they make the first part of cell theory: All living things are composed of cells -
Cell Theory To Animals
Theodor Schwann extended cell theory to animals seeing they have cells. Making the second thing in cell theory becuase plant cells have already been discovered the second part of cell theory was formed: 2-Cells are the basic units of structure and function in an organsim. -
3rd Part of Cell Theory
Rudolf Virchow made the thrid thing. Cells come only from the reproduction of other cells. -
Cell Theory Supported By Discoveries
Albrecht von Kolliker a cell theory supporter. He helped with his many discoveries such as animal tissue, the development of red blood cells, and the significance of germ layers. Albrecht von Kolliker studied anatomy and soology so his reputation helped with his discoveries. -
Disprove Spontaneous Generation
Louis Pastuer did an expeirment in 1885 to disprove spontaneous generation. In the expeirment he made some broth and poured it into two long necked flasks. He boiled both of them and let them sit for a couple weeks. When he checked on them he found germs in the straight one but not the narrow one. If spontaneous generation were true it would have been in both flaks he argued.
