1. Cell
History
van Leeuwenhoek
Hooke

2. Leeuwenhoek Made first microscope
Observed tiny creatures that moved-he called them “Animicules”- now known as bacteria

3. Cell History All life is made of cells
Discovered after microscope invented
1665: Robert Hooke first observed cork (dead plant bark)
Cork reminded him of tiny rooms
He named the empty boxes “cells”

4. CELLS
The Invention of the microscope made it possible for people to discover and learn about cells

5. Cell Theory Schleiden Schwann Virchow Three Parts:
1) All organisms are made of one or more cells
2) Cells are the basic unit of structure and function
3) All Cells come from cells that already exist.
What’s the big problem with this theory?
Schwann
Virchow

6. Schleiden
1838-Concluded that all plants are made up of cells

7. Schwann
1855-concluded that all animals are made up of cells

8. Virchow
Concluded that all cells come from other cells

9. Cell Categories 1) Prokaryote: Pro-Before Karyote-nucleus
No membrane around nucleus
Oldest cells known (~4 billion years old)
Believed to have evolved first (oldest fossils)
AKA: Bacteria

10. Cell Categories
2) Eukaryote: Cells with a nucleus & membrane bound organelles
Have a membrane around the nucleus
More complex cells
Evolved from prokaryotes
Ex: Protists, Fungi, Plants, Animals

11. How are living things organized?
Living things are organized into one of 6 kingdoms.
A Kingdom is a large group that shares some similar characteristics
The 6 Kingdoms are: Archeobacteria
Eubacteria
Protists
Fungi
Plants
Animals

12. Quick Review Cells shape is related to its job (function)
Cells are the basic units of life
Cells come from other cells