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Intro to the Cell - History Pgs. 16-22 in Cell Book.

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Presentation on theme: "Intro to the Cell - History Pgs. 16-22 in Cell Book."— Presentation transcript:

1 Intro to the Cell - History Pgs in Cell Book

2 Robert Hooke – 1665 First to describe cells while observing cork under a microscope. Wrote Micrographia, the first book describing observations made through a microscope There is no official portrait of Hooke

3 People believed that living things came from non-living things. They noticed flies on rotting meat and assumed that the flies came from the rotting meat itself Italian Francesco Redi set out to prove that life only comes from life. Spontaneous Generation Francesco Redi

4 Francesco Redis experiment Click on the link above to recreate his experiment

5 Anton van Leeuwenhoek Was the first to see bacteria under a microscope Made many advancements in the field of microscopy by making better microscope lenses and detailed observations

6 Schleiden, Schwann, & Virchow 1838, 1858 Cell Theory: All life forms are made from one or more cells The cell is the smallest form of life Cells only arise from pre-existing cells – "Omnis cellula e cellula"

7 Louis Pasteur French Scientist Louis Pasteur also worked to disprove spontaneous generation Said that bacteria came from other bacteria. Microorganisms floated in the air around us They would land and multiply when conditions were favorable

8 Pasteurs experiment Click on the link above to recreate his experiment

9 Compound Light Microscopes Uses lenses (two or more = compound) to magnify a specimen many times larger than normal size Magnifies the specimen 10x, 40x, 100x, and so forth Has a light source to illuminate the specimen Specimen is placed on a slide along with a drop of water, very thin section so that light can pass through


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