Cell theory
The Cell Theory was developed from three German scientist's discoveries. They are Matthias Schleiden, Theodor Schwann, and Rudolph Virchow.
In 1838 the German Botanist Matthias Schleiden discovered that all plants were composed of cells. Then only a year later a German zoologist, Theodor Schwann, discovered that all animals were composed of cells. Later in 1855 a German physician named Rudolph Virchow was doing experiments with diseases when he found that all cells come from other existing cells. Cells of course were discovered much earlier. The first person to see a cell was Robert Hooke. He used a very primitive microscope, but when he was looking at cork cells under the microscope he saw cells for the first time. The shape of the cells reminded him of the monk monasteries and so he dubbed them "cells." The first person to see living cells was Van Leeuwenhoek, a microscope builder. The cell theory is made up of three ideas: 1. All organisms are made up of one or more cells. 2. Cells are the basic unit of structure and organization of organisms. 3. New cells come from preexisting cells. |