1. Cell Size From Smallest to l a rgest + Prokaryotic Cells

2. Size Comparison

3. Kind of CellSize (approximate) Bacteria(E. coli) 1 um Red Blood Cell 8 um Elodea epidermal cell 65 um Amoeba 700 um Hen's egg 50,000 um

4. Smallest Cells Mycoplasmas bacteria 0.1 -1.0 µm

5. Largest Cells *Ostrich Egg Chicken Egg

6. Metrics 1 cm = 0.01 m (10 -2 )m centimeter 1 mm = 0.001 m (10 -3 )m millimeter 1 µm = 0.000 001 m (10 -6 )m micrometer 1 nm = 0.000 000 001 m (10 -9 )m nanometer 1 Å = 0.000 000 0001 m (10 -10 ) Angstrom

7. Longest Cells Muscle and Nerve Cells

8. Form and Function Nerve Long to send impulses

9. Form and Function Muscle Move bones

10. Form and Function Blood Cells Smooth, travel through blood vessels

11. Form and Function Skin Cell Flat top for protection Cube for cushion

12. As cells get larger, the surface area to volume ratio ______________________ (increases/decreases). decreases

13. Prokaryotic Cells

15. Contrasting Nucleoid and Nucleus

16. Which are bigger? Prokaryotic cells 0.2- 2µm in size Eukaryotic cells 10- 500µm in size

17. Cocci (spherical) Bacilli (rod) Spiral

18. Cyanobacteria Note the color: green

20. Bacteria Capsule Sticky to adhere to surfaces

21. Prokaryote flagella

22. Swimming Bacteria How Bacteria SwimHow Bacteria Swim (animation link) and also one at bottom