1. CELL THEORY AND CELL SCIENTISTS

2. INTRODUCTION BELLRINGER!!!
1. Trillion!!! Upto 60 trillion cells can be in a human
Animal. Because it is round! Does not have Cell wall or Chloroplasts
3. The microscope!!!!

4. Describe the key events leading to the development of the cell theory
Today we will…
Describe the key events leading to the development of the cell theory
Importance: The Cell theory is the unifying theme in biology because it emphasizes the similarity of all living things.

5. THE CELL THEORY State the cell theory...
Living things are composed of one or more cells
Cells are the basic units of structure and function of all living things
New cells arise from pre-existing cells.

6. Additions to the cell theory
In addition to being a unit of structure, cells are also units of reproduction, heredity and function.
All cells have essentially the same chemical composition

7. Early Scientists’
Contributions

8. Early Scientists and the Cell Theory a ted
SEE WEBSITE

9. Zacharius Jansen (1595)
First simple microscope.

10. Anton van Leeuwenhoek (1670’s-1700) light Microscope
First compound
light
Microscope
First to see bacteria

11. Robert Hooke (1665)
Coined the
term “cell”

12. Robert Brown (1831)
Discovered that plant cells had a special central part that he called the nucleus

13. Matthias Schlieden (1838)
All plants are made of
cells

14. Theodore Schwann (1839)
All animals are made of cells

15. Rudolf Virchow (1858)
Cells can only arise from preexisting cells

16. Other important people
Dutrochet- chlorophyll identification
Dujardin- sarcodes and protoplasm
Pasteur- studied bacterial cells
Marqulis- organelles were once free living from themselves

17. Questions...
Who used the first microscope?
Who said that plants were made
of cells
Who coined the term “cell”?
Who said that all animals were
made of cells?
Who said that cells must come
from existing cells?

18. Text Assignment: Read pages
Pages and
Complete Vocabulary cornell style in notebook
Organelle, Eukaryotic, Prokaryotic
Homework!!! Study all of today’s notes for a quiz on cell theory and cell scientists NEXT CLASS!!!!