1. Introduction to Cells

2. Cell Shape
The diversity in a cells shape reflects the different functions of cells
Example: Long extensions in nerve cells

3. Cell Size
The cell’s size is limited by the relationship of the cell’s outer surface area to its volume
Most cells typically micrometers

4. Basic Parts of a Cell
Plasma Membrane
Cytoplasm
Control Center

5. Plasma Membrane Cell’s outer boundary Covers the Cells Surface
Acts as a barrier between the inside and the outside of the cell

6. Cytoplasm Region within the plasma membrane
Includes the fluid, the cytoskeleton, and all of the organelles except the nucleus

7. Nucleus Membrane-bound organelle that contains a cell’s DNA
Control Center for the Cell

8. Two Basic Types of Cells
Prokaryotes
Lack a nucleus and membrane-bound organelles
Have a nucleoid instead of a nucleus
Examples are all bacteria and cyanobacteria

9. Two Basic Types of Cells
Eukaryote Cells
Contains a nucleus
Has membrane-bound organelles
Examples are plant cells, protists, fungi, and animal cells

10. Organelles
Subcellular structures that are well-defined, intracellular bodies that perform specific functions of the cell
Examples: Nucleus, Golgi Body, Mitochondria, etc

11. Cellular Organization
Multi-cellular Eukaryotes
Organize into tissues, organs, organ systems, and finally organisms