1. Levels of Organization

2. Atom
Smallest unit of matter
Carbon, hydrogen, oxygen
NON-living

3. Molecule 2 or more bonded atoms forming a compound Water, salt, sugar
NON-living

4. Macromolecule Very large, complex molecules
Proteins, fats, carbohydrates, nucleic acids
NON-living

5. Organelle a cell part that performs a specific function
Made of macromolecules
Nucleus, mitochondria, ribosome
Non-living

6. Cell Basic unit of structure & function in life Made of organelles
Nerve cells, blood cells, stem cells
LIVING

7. Tissue A group of similar cells that perform a certain function
muscle, fat, tendons, bone, hair
Living

8. Organ
A body part composed of various tissues that performs a certain function
Examples: lungs, heart, eye, kidney
Living

9. Organ System
A group of organs that work as a team to complete specific functions
Example: brain + nerves + eyes + etc = nervous system
Living

10. Something that has all 6 characteristics of life
Organism
Something that has all 6 characteristics of life
Usually made of systems
May be a single cell
Plants, animals, bacteria
Living

11. Levels of Organization in a Human

12. Levels of Organization in a Plant