1. Bellringer Unicellular Organisms
Discussion Questions:
How does the actual size of the unicellular organisms you are looking at compare with that of a familiar object?
What do these unicellular organisms have in common? How do they differ from one another?
What characteristics do these unicellular organisms share with multicellular organisms such as insects, birds, squirrels, and humans?
How do unicellular organisms get their nourishment? How do they get water? How do they get oxygen? How do they get rid of wastes?

2. Basic Structure of a Cell

3. Introduction to Cells Cells are the basic units of organisms
Basic types of cells:
Bacterial Cell
Animal Cell
Plant Cell

4. Number of Cells Organisms may be: Unicellular – composed of one cell
Multicellular- composed of many cells that may organize

5. Different kinds cells white blood cell Amoeba red blood cell
cheek cells
sperm
nerve cell
muscle cell
Amoeba
Paramecium

6. Levels of organization
Cells are grouped together and work as a whole to perform special functions

7. Tissue A group of similar cells to perform a particular function
Animals : epithelial tissue, muscular tissue
Plants : vascular tissue, mesophyll

8. Organ
Different tissues group together to carry out specialized functions
Heart : consists of muscles, nervous tissue and blood vessels
Leaf : consists of epidermis, mesophyll and vascular tissue

9. The Structures of a Leaf (Plant Organ)
Chloroplast
Palisade Mesophyll Cell
Spongy Mesophyll Cell
Air Space
Stoma

10. The Structures of a Heart (Animal Organ)

11. System
Several organs and tissues work together to carry out a particular set of functions in a co-ordinated way
Human : digestive, respiratory, excretory, circulatory and reproductive systems
Plant : root and shoot systems

12. Human Body Systems Examples of systems : Digestive System
Respiratory System
Circulatory System
Nervous System
Reproductive System

13. Examples of a Human Body System

14. Examples of a Human Body System

15. Examples of a Human Body System
Nervous System

16. Levels of Organization
CELLS (muscle cells,nerve cells)
TISSUES (muscle, epithelium)
ORGANS (heart, lungs, stomach)
SYSTEMS (circulatory system)
ORGANISM (human)

17. It’s You!

18. Cell Analogy
In a far away city called Grant City, the main export and production product is the steel widget. Everyone in the town has something to do with steel widget making and the entire town is designed to build and export widgets. The town hall has the instructions for widget making, widgets come in all shapes and sizes and any citizen of Grant can get the instructions and begin making their own widgets. Widgets are generally produced in small shops around the city, these small shops can be built by the carpenter's union (whose headquarters are in town hall).
After the widget is constructed, they are placed on special carts which can deliver the widget anywhere in the city. In order for a widget to be exported, the carts take the widget to the postal office, where the widgets are packaged and labeled for export. Sometimes widgets don't turn out right, and the "rejects" are sent to the scrap yard where they are broken down for parts or destroyed altogether. The town powers the widget shops and carts from a hydraulic dam that is in the city. The entire city is enclosed by a large wooden fence, only the postal trucks (and citizens with proper passports) are allowed outside the city.