Levels of Organization

1
Levels of Organization
2

• ATOMS
• Smallest part of matter
• NON-living
• Make up elements

3

• Molecules
• 2 or more bonded atoms
• Form compounds
• NON-living

4

• Macromolecule
• Very large molecules
• Proteins, fats, carbohydrates, nucleic acids
  (DNA)
• NON-living

5

• Organelles
• Tiny organs of cells
• Made of macromolecules
• Cannot live on their own

6

• Cell
• Made of organelles
• Basic unit of structure function
• LIVING

7

• Tissue
• The same kind of cells working together to
  perform a function digestion, communication,
  support, cushioning, etc.
• Living

8

• Organs
• Tissues that work together
• Living
• Heart
• Liver
• Brain

9

• Systems
• Organs that work together
• Living
• Digestive
• Nervous
• Excretory
• Respiratory
• Circulatory

10

• Organism
• Entire living things (organisms)
• Usually made of systems
• May be a single cell
• Organelles no tissues or systems
• Living

11

• Population
• Same type of organism living together same
  species

12

• Community
• Several populations living together
• Population interact

13

• Ecosystem
• A biotic (living) community plus the abiotic
  (nonliving) features

14

• Biome
• Similar ecosystems on earth together

15

• Biosphere
• Whole living layer around the globe
• Includes abiotic features

http//people.hofstra.edu/geotrans/eng/ch8en/conc8
en/envisys.html
16
Atom Molecule Macromolecule Organelle Cell Tissue Organ System Organism Population Community Ecosystem Biome Biosphere