1. CELL ORGANIZATION & UNICELLULAR ORGANISMS
Sections 2.1/2.2

2. Unicellular Organisms
Multi-cellular Organisms
Organisms made of more than one cell.
Unicellular Organisms
One celled organism..

3. CELL ORGANIZATION Cells
Specialized cells to carry out specific functions
Example. epithelial cells, muscle cells, nerve cells, fat cells
Tissues
Groups of cells that are similar in shape and function
Example. The skin that covers the outside surfaces of you body is epithelial tissue.
Organs
Tissues that are organized into larger structures that have one function
Example. Heart pumps blood through your body.
Organs Systems
Groups of organs that have related functions
Example. Circulatory system includes the heart, arteries, capillaries, veins

4. Level of Cell Organization in the Human Body

5. UNICELLULAR ORGANISMS
Another word for a unicellular organism is a micro-organism or a microbe because they are only visible under a microscope
Carry out all of life’s functions (feeding, digesting, excreting, and reproducing), and yet it is only made up of one cell!

6. BACTERIA Among the most primitive and most plentiful organisms
They are prokaryotic cells that have no nucleus, no mitochondria and no ribosomes
found every where on Earth
100 trillion bacteria inside average human body
500 different types of bacteria in your mouth

7. PROTISTS neither plant nor animal
eukaryotic cells having a nucleus mitochondria, ribosomes, and lysosomes
Found wherever there is water such as pond water

8. Examples of PLANT-LIKE PROTISTS
Contain chlorophyll and produce their own food by photosynthesis
Diatoms: fresh and salt water and are encased in 2 thin shells
Euglena: with sunlight produce their own food, without sunlight feed on smaller cells so are similar to both plant and animal cells
Freshwater Diatoms
Euglena

9. Examples of ANIMAL-LIKE PROTISTS
Cannot make their own food and feed on living things or things that were once alive
Amoeba
Paramecium

11. FUNGI Include both unicellular and multicellular organisms
Examples: bread mould, mushrooms, athlete’s foot
Yeast is a unicellular fungus that feeds on other organisms
Bread Mold
Yeast budding

12. Mind Map Diagram of Unicellular Organisms
Bacteria
Diatoms
Plant-like
Yeast
Euglena
Fungi
Protists
Amoebae
Animal-like
Paramecia