1. DO NOW Take a Note Packet from the front Complete Page 1 sections I, II, and II (The History of the Cell, Microscopes and Cells, and Cell Theory)

2. The History of the Cell The Cell The basic unit of an organism Discovery made possible by the invention of the microscope

3. Microscopes and Cells 1600’s. Anton van Leeuwenhoek first described living cells as seen through a simple microscope.

4. Microscopes and Cells 1830’s. Mathias Schleiden identified the first plant cells and concluded that all plants made of cells. Thomas Schwann made the same conclusion about animal cells.

5. Cell Theory All organisms are made up of one or more cells. The cell is the basic unit of organization of all organisms. All cells come from other cells already in existence.

6. Cells  There are 200 different kinds of cells in the human body!  Shape of cells is dependent on Function

7. Two basic cell types Karyon= Nut or kernel Pro= Before Eu= true Prokaryotic and Eukaryotic cells

8. Prokaryote Vs. Eukaryote ProkaryoteEukaryote # of Cells Size Organelles DNA Example

9. Two Basic Cell Types 1 ) Prokaryote Lacks internal compartments. No true nucleus. Most are single-celled (unicellular) organisms. Examples: bacteria

10. Two Basic Cell Types 2) Eukaryote Has several internal structures (organelles). True nucleus. Either unicellular or multicellular. unicellular example: yeast multicellular examples: plants and animals

11. Do Now Distinguish between prokaryotic and eukaryotic cells. Give examples of each. Tonight’s homework: Read Pages 116 to 122. Stop at the concept review questions on page 122. Do questions 1, 4, and 5 (in complete sentences).

12. Parts of the Eukaryotic Cell BOUNDARIES  CELL MEMBRANE (Plasma membrane)  boundary between the cell and its external environment  Semi-permeable/selectively permeable  Made of 2 layers of lipid (phospholipid) with embedded proteins

13. Lets Draw the cell membrane! Cell membrane is referred to as a fluid mosaic model Video

14. The Parts of The Eukaryotic Cell 1) Boundaries A) Plasma Membrane -- Serves as a boundary between the cell and its external environment. -- Allows materials to pass in and out of the cell.

15. CELL WALL  Protects and maintains structure  Plant cell walls are made of cellulose  Bacteria, fungi, and some protozoa have cells walls- made of chitin and sometimes proteins

17. The Parts of The Eukaryotic Cell B) Cell Wall -- Surrounds the plasma membrane of the cells of plants, bacteria, and fungi. -- Plant cell walls contain cellulose while fungi cell walls contain chitin.