1. WARM UP Today we start our unit on living things
List three objects in the classroom that you would consider to be “living”
List three objects in the classroom that you would consider to be “non-living”

2. ESSENTIAL QUESTIONS What makes something living vs. non living?
What is the relationship between cells, tissue, organs, & organ systems?

3. BRAINSTORMING
Write two questions that you would like to be answered by the end of the Unit on the Cell

4. The Organization of Living Things

5. LIVING VS NON LIVING
What makes an object be classified as living or non living?
Lets brainstorm some ideas and write them on the board.

6. SWITCH POWERPOINTS

7. Benefits of Being Multicellular
Larger Size: larger organisms are prey for fewer predators. Also, large predators can eat a wider variety of prey
Longer Life: not limited to the life span of any single cell
Specialization: each type of cell has a particular job. This makes the organism more efficient!

8. Example:
Cardiac Muscle Cell

9. 4 LEVELS OF ORGANIZATION
1. Cell
2. Tissue
3. Organ
4.Organ System

10. Level 1: Cell
-Building blocks of life. Smallest unit that can perform life processes independently
-Example: plant cell (square) and animal cell (round)

11. LEVEL 2: TISSUE CELLS WORKING TOGETHER
Tissue: a group of cells that work together to perform a specific job
Example: nerve tissue

12. 2. muscle tissue
3. connective tissue

13. Example: Adipose (fat) cells in the skin
4. Protective Tissue
Example: Adipose (fat) cells in the skin

14. LEVEL 3: ORGAN TISSUES WORKING TOGETHER
Organ = a collection of tissues that carry out a specialized function of the body
Example: heart
- has mostly cardiac tissue, but also has nerve tissue and tissues of the blood vessels that all work together
Other examples: stomach, intestines, brain, and lungs

15. Examples in plants: the leaf plant organ that contains tissue that traps light energy to make food
Also: stems and roots

16. Is That a Fact?!
In your lifetime, your body will shed about 40 pounds of dead skin!

17. LEVEL 4: ORGAN SYSTEM ORGANS WORKING TOGETHER
Organ system = group of organs that work together to perform body functions
Examples: digestive system, which includes several organs, such as the stomach and intestines

18. On its own: Organism
Organism = a living thing; anything that can carry out life processes independently
An organism can be unicellular, like this bacteria:

19. OR an organism can be multicellular, like you!

20. Structure & Function In organisms, structure and function are related.
Structure = arrangement of parts in an organism
-Includes the shape of a part and the material of which the part is made
Function = the job that the part does

21. Example of Structure and Function:
The structure of the lungs is a large, spongy sac. Blood vessels wrap around aveoli (air sacs). The structure of the aveoli and blood vessels enable them to perform a function, which is bring oxygen into the body and take out carbon dioxide.

22. Review:
1. A ____________ is the most basic unit of all living things. 2. The job that an organ does is the _________ of that organ. 3. A group of cells working together to perform a specific function is a ______.

23. Answers:
1. cell
2. function
3. tissue

24. EXIT SLIP
If you were to compare the four levels to a scho