1. Chelsey Hropovich & Domonique Swann
Why are cells small?
Chelsey Hropovich &
Domonique Swann

2. Recognition to Robert Hooke and Anton Van Leeuwenhoek
First to observe cork cellulae (small rooms)
Leeuwenhoek
First to observe living cells (Animalcules or little animals)

3. Cell Size is limited
Relating to the diffusion of substances into and out of cells, the rate of diffusion is affected by the number of variables including:
Surface area able for diffusion
Temperature
Concentration gradient of diffusion substance
The distance over which diffusion must occur

4. If a cell grows beyond a certain size
Materials will not be able to pass through the membrane fast enough
When the cell reaches a size too large, it will divide into smaller cells in order to maintain a surface area/volume ratio.
Therefore, cells remain small in order to survive.

5. What do cells look like?

6. Cell Quiz
What are the four variables that affect the rate of diffusion?
concentration, height, mass, and length
surface area, density, concentration, and volume
surface area, temperature, concentration, and density
Green eggs and ham, with O.J.