1. Cell Notes

2. Cell Theory All living things are composed of cells.
Cells are the basic units of structure and function in living things.
New cells are produced from existing cells
* If we can understand how the cell works, then we can understand how the creature works.

3. 2 Types of Cells Prokaryotic Eukaryotic
Cells without well-defined nucleus
Eukaryotic
Cells with a membrane enclosed, well-defined nucleus

4. Number of Cells Possible
Unicellular
How many cells do you think these organisms have?
Multicellular
How many cells do you think these have?

5. Size of cells Are cells small or big or somewhere in between? SMALL
Why are cells small regardless of the size of the organism?

6. Cells are like a Factory

7. Cell

8. Organelles (8 that both have)
Nucleus (Main Office)
The control center for all cell activities
Picture of a Nucleus
Cell Membrane (Front Door)
Controls entrance into the cell

9. Organelles (8 that both have)
Mitochondria (Local Power Plant)
Produces cellular energy called ATP
Golgi Apparatus (Shipping)
Packages & Sorts macromolecules for delivery to organelles or secretion

10. Organelles (the 8 continued)
Endoplasmic Reticulum (ER)
Conveyer Belt
Highway system within cell. Also involved in Protein Synthesis
Ribosome (Machine)
Maker of protein

11. Organelles (the 8 continued)
Cytoskeleton (Support Beams )& Cytoplasm (Factory minus the Nucleus)
Used to keep cell shape

12. Organelles (Plant Only)
Cell Wall
Rigid Outer covering prevents gravity from crushing cell
Chloroplast
Captures energy for the cell, site of photosynthesis

13. Organelles (Plant Only)
Vacuole (Storage Closet)
Large empty space used to help keep shape & store extra water, food & waste

14. Organelles (Animal Only)
Lysosome (Custodians)
Packages & digests macromolecules
Centrioles (Secretaries)
Organizing centers for cell division

15. Examples Cell Membrane Cheek Cells Onion Skin Cells Nucleus Cell Wall
Potato Cells

16. Review What are the three main parts of the cell theory?
What are the two types of cells?
What is the difference between them?
Are we unicellular or multicellular?