The document outlines the historical development of cell theory, beginning with Robert Hooke's discovery of cells in cork in 1665, followed by the identification of the nucleus by scientists in the early 19th century. It highlights contributions from Matthias Schleiden and Theodor Schwann, who established that all plants and animals are made of cells, and Louis Pasteur's work on microorganisms and vaccination. Notable achievements mentioned include the germ theory, the first vaccine against rabies, and the discovery of antibiotics.

1. THE HISTORY OF CELLS Roel R. Maraya Discovering CELLS

2. Robert Hooke (1665 ) Studied cork tissue and found tiny boxes and named it "cells ".

3. The tiny boxes seen by Robert Hooke through a homemade microscope particularly a Compound Microscope .

4. Robert Hooke's Compound Microscope

5. In 1831, Scientists observed the nucleus of a cell and named it " little nut ".

6. Matthias Schleiden (1838) a German Botanist studied a variety of plant tissues and found out that every type was made of many cells.

7. Theodor Schwann (1839) studied all animal tissues and found out that every type was made of cells too. German Zoologist

8. CELL THEORY This states that cells are building blocks of life and that cells come from other cells.

9. Louis Pasteur (1857) a studied single-celled microorganisms developed Pasteur's Germ Theory that changed medicine French chemist and microbiologist

10. Examples of Microorganism

11. Pasteur's Contributions: development of vaccination made the first vaccine against rabies

12. 1940s Development scientists develop antibiotics penicillin was discovered to fight bacterial infections

13. People in Science

14. Gary Sayler a Beaman Distinguished Professor of Microbiology. studies how microbes (another name for microorganisms ) live and how they interact with other living things.

15. 1857 1839 1838 1665 1831 Robert Hooke names the cell Scientists named the nucleus “little nut”. Schleiden studied plant tissues Schwann studied animal tissues Pasteur researched on single-celled organisms 1997 Development of vaccination First cloned organism present

16. That's all for now. Thank You!