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Biology Chapter 03-1 - 1 Chapter 3 Section 1 The Diversity...

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Chapter 3 Section 1 - The Diversity of Cells All living things are made of cells. Cell - membrane-covered structure that contains all the materials necessary for life. Robert Hooke was the first person to describe cells. In 1665, he built a microscope to look at tiny objects. One day he was looking at a thin slice of cork.  Under the microscope the cells looked like “tiny rooms”.  Cell  in Latin means tiny  room. Since he couldn’t see cells in animals, he thought they were not made of cells. In 1673 Anton can Leeuwenhoek, a Dutch merchant, made his own microscope. When he was looking at pond water, he saw tiny animals.   He called them animalcules, which means “little animals.” Today we call them protists. Leeuwenhoek also looked at animal blood. Leeuwenhoek was the first person to see bacteria. Almost 200 years passed before scientists concluded that cells are present in all  living things.
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