1. History of the Cell
Chapter 4

2. Discovery of Cells
Robert Hooke --- Discovered and named the first cell
Anton van Leeuwenhoek --- Discovered 1st living microscopic organisms.

3. Schleiden --- Concluded that all plants are made of cells.
Schwann – Concluded that all animals are made of cells.
Virchow --- Discovered all cells come from other cells

4. Cell Theory Parts 3 parts to the cell theory:
Cells are the basic unit of life
All organisms are made of 1 or more cells
All cells come from already existing cells

5. Cell Diversity Size Shape Most cells visible only with a microscope
Cells are limited in size by ratio between outer surface area & volume
Surface area & volume do not increase at the same rate
As size increases, volume increases faster than surface area
Shape
Cells come in varieties of shape
Diversity reflects a diversity of functions. Ex. Nerve cells

6. Prokaryotic vs. Eukaryotic
Prokaryotic = Unicellular; cells that lack membrane-bound nucleus & other organelles. Example = bacteria cells
Eukaryotic = cells that contain membrane-bound nucleus & other organelles. Examples = plants & animal cells