1. Systems All levels of life have systems of related parts.
A system is an organized group of related parts that interact to form a whole.
Task: With your tablemate, write down one example of a system and explain why you think it is a system.

2. Examples of Systems

3. Systems in Biology
Systems can be as small as atoms and molecules to as big as the universe.
Systems have boundaries
E.g. Human skin that surrounds and holds together our internal organs.
Systems have inputs and outputs
matter and energy coming into and of the system boundaries

4. Levels of Organization in Biology All levels of biology contain systems.
Atom
Molecule
Cell
Tissue
Organ
Organ Systems
Organism
Population
Community
Ecosystem
Biosphere
ECOLOGY

5. The Biosphere
The thin layer of earth and it’s atmosphere that supports life.
8 km up and 10 km down from sea level.
Made up of all the earth’s ecosystems combined
living and non living factors
contain a finite limited supply of certain resources and living species.

6. Systems
Systems are a unifying theme in biology. We will be talking about it all year long.
Exit Slip: What 3 ways is a cell a system?