1. 3.1 The Cell Theory VOCABULARY KEY CONCEPTS PROKARYOTE EUKARYOTE
Who were the Scientists that contributed to the cell theory?
What are the parts of the cell theory?
What are the 2 types of cells?

2. Robert Hooke (1635-1703) English scientist.
Developed the first compound microscope.

3. Robert Hooke – Discovered CELLS
In 1665, he used his microscope to look at cork cells.
Hooke coined the term “cell”
What he saw under the microscope reminded him of the living quarters of the monks (cells).

4. Anton van Leeuwenhoek (1632-1723)
Dutch curtain maker who ground lenses as a hobby.
Improved and perfected the microscope.
The first to observe living cells
- (blood cells and bacteria
from his teeth.)

5. Mathias Schleiden (1804-1881) German Botanist
Observed that all plants are made up of cells.

6. Theodor Schwann (1810-1882) German Zoologist
Observed that all animals are made up of cells.

7. Rudolf Virchow (1821-1902) German Doctor
The first to observe cells reproduce.
Deduced that animal cells come only from animals, plant cells come only from plants.

8. The Cell Theory Cells are the basic units of life
The observations of these scientists led to the cell theory.
The modern cell theory has 3 parts:
Cells are the basic units of life
All living things are made of one or more cells.
All cells come from preexisting cells.

9. Organization of Life
Organisms can be uni-cellular (single-celled) or multicellular.
Multicellular organisms are organized into complex structures.
Multicellular organisms: have specialized cells to perform a single function.
Ex. Red blood cells carry oxygen; muscle cells provide movement

10. Molecules
COMBINE TO FORM

11. Cells
Make up
Red blood cells

12. Tissues
Make up
Cardiac muscle

13. Organs
Make up
Heart

14. Systems
Make up
Circulatory System

15. Organisms

16. POPULATIONS ________________________ ________________________
Make up
________________________
Make up
________________________
Make up
________________________

17. Types of Cells
Prokaryotic cells – the first cells that have little internal structure. DO NOT HAVE A NUCLEUS
Eukaryotic cells – evolved from prokaryotic cells & have “mini organs called organelles.”
HAVE A NUCLEUS
Organelles – structures in the cell responsible for carrying out specific functions. “cell organs,”

18. Prokaryotic Cells
Prokaryotic cells are always single-celled organisms.
Ex. Bacteria
Very simple structure – cell wall and membrane surrounding cytoplasm.

19. Eukaryotic Cells Can be single-celled or multicellular organisms.
Ex. Algae (single) or plants (multi)

20. Eukaryotic Cells
Structure divided into 3 areas: NUCLEUS, CYTOPLASM, AND CELL MEMBRANE.
Eukaryotic cells have numerous organelles