1. Levels of Organization
Cells: Part II
Levels of Organization

2. Many celled organisms ARE NOT just mixed up collections of different types of cells. They are ORGANIZED in a certain way.
The levels of organization are as follows:

4. CELLS
Organized so they can work together.
Sickle cell
Normal cell

5. TISSUES Groups of similar cells that all do the same sort of work.
Examples: blood, muscle, bone
Muscle tissue is made of muscle cells, bone tissue is made of bone cells, etc.

6. Tissue within the stomach

7. ORGANS Different types of tissues working together
Examples: Stomach, liver, heart, skin, etc.
Stomach is made of muscle tissue, nerve tissue, & blood tissue

9. Stomach + mouth + intestines + liver = digestive system
ORGAN SYSTEMS
Group of organs working together to do a certain job
Examples: respiratory, circulatory, digestive, reproductive, nervous
Systems ARE DEPENDENT on other systems in your body
Stomach + mouth + intestines + liver = digestive system

10. Digestive system

11. ORGANISMS
YOU