Name the three parts of the cell theory

The Cell Theory

1. All living things are composed of cells.

2. Cells are the basic units of structure and function in living things.

3. All cells are produced from other cells.

1590

This father and son team are given credit for inventing the first compound microscope.

Hans and Zacharias Janssen• Zhacharias most likely had help from his

father Hans.• Could magnify 3 to 9 times (maybe up to 10x)• Would be more than 50 years before the

microscope was used by scientists.

1665

English Scientist famous for his microscope drawings

especially cork.

Robert Hooke

Hooke's microscope Courtesy - Billings Microscope Collection, National Museum of Health and Medicine, AFIP

Robert Hooke’s Drawing of Cork

• Thought the chambers looked like little rooms in the monastery.

• Called them “cells”

Robert Hooke - Published book in 1665 called Micrographia (tiny drawings).

1674

Dutch lens maker who was the first to identify bacteria by looking at scrapings from his

teeth

Anton Van Leeuwenhoek

Leeuwenhoek was not a good artist so he described in great detail what he saw under the microscope.

1838

This German botanist studied plants and

discovered that all plants were made up of cells

Matthias Schleiden

Matthias Schleiden (1804 – 1881)All plants are made up of cells

1839

This German scientist extended the work of his friend Matthias Schleiden and discovered that ALL cells (plants and animals)

were made of cells.

Theodor Schwann

Theodor Schwann (1810 – 1882) All animals are made up of cells

1855

German Doctor famous for saying, “ominis cellula e cellula” - all cells arise from other cells.

Rudolf Virchow

Virchow applied his ideas to disease. He thought that all disease was caused by cells that did not function properly.

1864

This French Chemist disproved the widely accepted theory of

spontaneous generation.

Louis Pasteur

Think about the seven scientists that we have studied. Which three do you think were the most important in the development of the cell theory?

Support each choice with information from your research.