1. 10-19-11 Wednesday Today’s Topic:
Prokaryotic Cells – Bacteria (e.coli, bubonic plague)
Tomorrow and Friday: Viruses
Make sure you have your science notebooks out!

2. There are 2 types of cells
EUKARYOTE
PROKARYOTE

3. Eukaryotic Cells Animals, plants, and fungi are eukaryotes
Eukaryotes are organisms whose cells are organized into complex organelles.

4. Prokaryotic Cells Bacteria and prokaryotes
Prokaryotes are unicellular (one celled) organisms that lack a nucleus and most organelles.

5. Huge Size Difference! Eukariotic Cells are BIGGER!
Prokaryotic Cells are TINY!
Eukariotic Cells are BIGGER!

6. Actual Prokaryotic Cells

7. Which organelles is the Prokaryote cell missing?

8. Artist’s illustration of a Prokaryote and Eukaryote Cell
Which type of cell is more complex?
Artist’s illustration of a Prokaryote and Eukaryote Cell

9. Major Takeaways Prokaryotes do NOT have a nucleus
They have one strand of DNA that just floats around
They lack MOST organelles
Prokaryotes are WAY more simple than eukaryotes

10. What Is Bacteria?
Bacteria are tiny, one-cell creatures that get nutrients from their environments in order to live.

11. Are All Bacteria Bad?
No, some are very helpful (Ex: There are bacteria in your stomach that help break food down)
Only some bacteria are harmful - Bacterial infections can be treated with antibiotics

12. E. coli Found in the intestines of mammals Many types
Most harmless/helpful--produce vitamins
Some cause “food poisoning”

13. Staph infection Scientific name: Staphylococcus aureus
20-30% of the population carry staph on their skin
Only becomes a problem when it gets into a cut or out of control

14. Diseases caused by Staph infections:
Minor diseases: pimples, impetigo, boils, scalded skin syndrome, abscesses

15. Bubonic Plague: “Black Death”
Caused by bacteria, carried by fleas which are carried by rats
Infects the immune system
Key symptoms: buboes (bulges from swollen lymph nodes), delirium, vomiting, headaches, bleeding lungs

16. A bacterium, carried by fleas which are carried by rats

17. Black death epidemic
Killed approximately 1/3 of the European population in the s
Traveled and spread quickly

18. Ring Around The Rosie Ring around the Rosie Pocket full of posy
Ashes, Ashes
We all fall down
(Ring around the rosie, what do you suppose we can do to fight the darkness in which we drown. Ring around the rosie, this evil thing it knows me, lost ghosts surround me, I can't fall down)

20. Plague still exists, but is easily identifiable and can be cured with antibiotics.

21. Other Life-threatening diseases Caused By Bacteria: pneumonia, meningitis

22. “Flesh Eating Disease”