1. Chapter 16: Section 1 The World of Cells

2. Why are cells important?
They help us do what we do
Breakdown food
Move
Grow
Reproduce

3. Cells have jobs Some help move things around the organism
Some fight disease

4. Bacteria
Smallest organisms on Earth
Made of only one cell

5. Larger Organisms
Made of many cells

6. What are cells made of? A cell is like a bakery
Many parts doing different jobs

7. Organelles
Each does a different job
In the bakery:
The workers

8. Cell membrane Holds cell together Is a boundary
Plants also have cell wall for support and protection
In bakery:
The walls

9. Cytoplasm Like Jello/Where activities take place In Bakery:
The kitchen

10. Nucleus Vacuoles Contains chromosomes (plan for cell) In Bakery:
the manager
stores food, waste
In bakery:
pantry, trash can

11. Mitochondria Where cellular respiration happens
Food energy turned into energy cell can use
In the bakery:
oven
Where cellular respiration happens

12. Chloroplasts
Makes leaves green

13. Some cool cell models

14. Different Jobs of Cells
Ch 16 Sec 2

15. Special Cells for Special Jobs
Human Cells— (see pg 483)
Fat Cells—store fat, sometimes the nucleus gets pushed out
Skin Cells—flat, close together

16. Bone Cells—surrounded by hard substance made of calcium and phosphorus
Muscle Cells—long with many fibers

17. Cell Organization
How well do things work if the different parts are mixed together?
Many-celled organisms are not just mixed up collections of different types of cells, they are organized into systems that work together

18. Cell Organization Tissues Cells that are alike and work together
Bone tissue, nerve tissue, and blood

19. Organ
Tissues that are working together
Stomach is the organ, but has nerve, muscle, & bone tissue

20. Organ systems
Group of organs that work together to do a certain job
Stomach, mouth, intestines and liver all work together for digestion to occur

21. Levels of Organization
Make a chart with two columns
In column one list the different levels of organization beginning with the cell.
In column two, list a real world example of the same type of organization