1. Levels of Organization

2. Life is organized into 5 levels:
Cells
Tissues
Organs
Organ systems
Organisms

3. There are 5 Levels of Organization in Multicellular Organisms:
1. Cells
2. Tissues
3. Organs
4. Organ Systems
5. Organisms

4. the CELL
The cell is the basic unit of structure and function of a living thing.
Cells are specialized by size and shape for the job they do
The amoeba above is made of only one cell and it must perform all the jobs of the organism.

5. T I S S U E S
Tissues are Made up of cells that are similar in structure and function and which work together to perform a specific activity
Examples: 4 different types of animal tissues are epithelial, muscle, nervous, and connective. This pink sponge has only cells but they are not organized into tissues. The blue Man-o-war has tissues but no organs.

6. Organs
Organs are made up of different tissues that work together to perform a specific activity.
Example: a heart is an organ made of all four tissues, this coral polyp is an organ and a leaf is a plant organ.

7. Organ Systems
An organ system is a group of organs working together to perform a specific function for the organism
Example: Human organ systems include circulatory, reproductive, digestive, nervous, respiratory.
Plant organ system-roots, stems,leaves= transport system.

8. Organisms
Entire living things that can carry out all basic life processes.
Meaning they can take in materials, release energy from food, release wastes, grow, respond to the environment, and reproduce.