Systems

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					                Objectives
• Define and identify a system.
• Investigate how systems are organized.
• Describe how properties of a system can be
  different from its parts.
               In the Story…
The BPC group travels to India. They
come into contact with many sick
people.
Hepatitis is a virus that attacks cells in
the liver. Without healthy cells, the liver
cannot function properly.
Without a healthy liver, our bodies
cannot function properly.
         What is an Organism?
An individual living system.
The human body is an organism. It is composed
from a variety of different types of cells that
work together so the body can function properly
       Organism Organization
Every organism is organized into levels.

Organism – Ex. Human
Organ systems – Ex. Circulatory
Organs – Ex. Heart
Tissues – Ex. Muscle
Cells – Ex. Red Blood Cells
           From Cell to System
After the hepatitis virus attacks the liver cells,
the entire liver cannot function properly.
If the liver cannot do its job, then it affects the
entire digestive system.

  What do you think might happen to a person
    whose digestive system quit working?
         What exactly is a system?

System: a set of interacting or interdependent
parts forming an integrated whole.
We define a system by grouping parts with the
same set of relationships or characteristics.
All pieces/parts of a system serve a specific role
for the purpose of the system.
  – Some parts are more essential than others.
                Types of Systems
Natural systems: occurring
in nature, not created by
humans.


Man-made systems:
designed for a specific
purpose or objective.
  Can you name some examples?
Natural:
   •   Solar system
   •   Root system of plants
   •   Organ systems of animals
   •   River/lake systems


Man-made:
   •   Car
   •   Computer
   •   Engine
   •   Grading scale/system
   •   the Internet
                   Computer System
•   Monitor
•   Mouse
•   Keyboard
•   Wires/cables
•   Computer tower
    – Hard drive
         • RAM/memory
    –   CPU
    –   Disk drives
    –   Fan for cooling
    –   Video/sound cards
                    Smallest Systems
• Some of the smallest natural systems include
  cells and atoms.
                                Basic Atomic Structure




www.earthlife.net/cells.html
Are humans a type
   of system?


   We are all composed of
  interconnected parts that
rely on the other parts of the
    system to sustain life.
 Teachers, please click on this link to complete a short survey concerning this
        module: http://peer.tamu.edu/forms/Curricula_Survey.shtml.

This product is available through the cooperation of the following:

              National Institute of                       Department of
              Environmental Health                        Agricultural Education,
              Sciences                                    Texas A&M University


              Partnership for
                                                          The Center for
              Environmental
                                                          Environmental and
              Education and Rural
                                                          Rural Health
              Health

                                                          College of Veterinary
              College of Education,                       Medicine, Texas A&M
              Texas A&M University                        University

				
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posted:2/17/2013
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