1. Cell Structure and Function Chapter 7 EOC Goal 2

2. Review and Basic Information Cells are the basic unit of living things Organization of living things: cells  tissues  organs  systems  body

3. Important People in Cell History

4. Galileo (1620’s) Given credit as the first person to create a microscope (from a modified telescope)

5. Robert Hooke (1665) Observed cork cells (cork is dead plant matter) Named the CELL  he said the cell looked like the “cells” in a monestary

6. Antony von Leeuwenhoek (1600’s) Observed microscopic organisms with the first true light microscope Observed the first bacterial cell (not seen again for over 200 years) Observed red blood cells

7. What Leeuwenhoek saw Spiral Bacteria Red Blood Cells

8. Robert Brown (1833) Botanist Observed that plant cells have a dark structure that stains in the middle Named the structure he saw the NUCLEUS

9. Matthias Schleiden (1838) Botanist Noticed that ALL plant tissues are composed of cells

10. Theodore Schwann (1839) Zoologist Noticed that all animal tissues were composed of cells

11. Francesco Redi (1700’s) Disproved SPONTANEOUS GENERATION (theory that all living things come from non- living matter) Used meat & maggots in his experiment

12. Redi’s Experiment

13. Rudolf Virchow (1858) Proposed that ALL cells come from pre- existing cells Refuted spontaneous generation Proposed BIOGENESIS (living things come from other living things)

14. Louis Pasteur (1862) Further disproved spontaneous generation using meat broth experiment Boiling a substance will kill any living matter (PASTEURIZATION)

15. Pasteur’s Experiment

16. What did we learn from these people?

17. THE CELL THEORY 1.All living things are made of cells (Schwann & Schleiden). 2.All cells arise from pre-existing cells (Virchow, Redi, Pasteur). 3.Cells are the basic unit of structure and function of living things (Schwann & Schleiden).

18. Two Basic Types of Cells Prokaryotes –Unicellular (made of one cell) –Do NOT have a nucleus –Example: bacteria

19. Two Basic Types of Cells Eukaryotes –Unicellular and Multicellular Multi = many cells –DO have a nucleus –Examples: Plants Animals Protists Fungi