7th science Malnory/Pietsch The Cell Theory 1.

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Students Will: summarize the contributions scientists have made toward the cell theory state the cell theory.
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Presentation transcript:

7th science Malnory/Pietsch The Cell Theory 1

The Cell Theory The development and refinement of magnifying lenses and light microscopes made the observation and description of microscopic organisms and living cells possible. 2

The Cell Theory Many scientists contributed to the cell theory 3

The Cell Theory 3 parts to the cell theory: 1. The cell is the basic unit of life. 2. All living things are made of cells. 3. Cells come from pre-existing cells. 4

Hans and Zacharius Janssen Father and son who made eyeglasses. Invented the first compound microscope.

Robert Hooke (1635-1703) He observed that cork has small regular boxes in it that he called “cells”. 6

Hooke’s cork cells 7

Anton van Leeuwenheok (1632-1723) He invented the first microscope. Dutch scientist who was the first to see bacteria and protists. 8

Leeuwenhoek’s Microscope 9

Robert Brown (1773-1858) Scottish botanist who noticed that all cells have a dark region that he called a “nucleus” 10

Matthais Schleiden (plants) Theodor Schwann (animals) Theodor Schwann and Matthais Schleiden stated that all living things are made of cells. (1839) Matthais Schleiden (plants) Theodor Schwann (animals) 11

Rudolph Virchow (1821-1902) German scientist who discovered that all cells come from pre-existing cells. 12

The Cell Theory Continued advances in microscopy allowed observation of cell organelles and structure. 13

Plant cell: Animal cell:

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