1. ORGANIZATION OF LIFE
Chapter 1 Section 3
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2. Objectives:
 List three advantages of being
Multicellular.
 Describe the levels of organization in
living things.
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3. Cells:
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4. Cells:
• A cell is a membrane-covered
structure that contains all of the
materials necessary for life.
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5. Cells:
• A cell is a membrane-covered
structure that contains all of the
materials necessary for life.
• Cells are only seen with a
microscope.
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6. Cells:
• A cell is a membrane-covered
structure that contains all of the
materials necessary for life.
• Cells are only seen with a
microscope.
• You have about 200 different kinds of
cells in your body.(example: red
blood cells, white blood cells,
bacteria cells)
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7. Tissue:
Cells Working
Together
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8. Tissue:
Cells Working
Together
• A tissue is a group of
cells that work together to
perform a specific job in the
body.
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9. Tissue:
Cells Working
Together
• A tissue is a group of
cells that work together to
perform a specific job in the
body.
• Blood, fat, and muscle cells
are just a few of the many cells
that make tissues in your body.
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10. Organs:
Tissues Working Together
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11. Organs:
Tissues Working Together
• Organ is two or
more tissues
working together
to perform a
specific job.
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12. Organs:
Tissues Working Together
• Organ is two or
more tissues
working together
to perform a
specific job.
• Examples include:
stomach,
intestines, heart,
lungs, and skin
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13. Organ Systems:
Organs working together
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14. Organ Systems:
Organs working together
• An organ system is a
group of organs
working together to
perform particular
jobs. (Examples:
digestive system,
nervous system,
respiratory system)
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15. Organ Systems:
A Great Combination
• The organs in an organ system
depend on each other. If any
part of the system fails, the
whole system is affected.
Failure of one organ system
can affect other organ systems.
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16. Organism:
Independent Living
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17. Organism:
Independent Living
• An organism is anything that
can live on its own and is made
up of at least one cell.
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18. Organism:
Independent Living
• An organism is anything that
can live on its own and is made
up of at least one cell.
• Example: Cat, Human, oak
tree)
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19. Types of Organisms:
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20. Types of Organisms:
• Unicellular organism is a single
cell that is living on its own.
(Example: Bacteria)
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21. Types of Organisms:
• Unicellular organism is a single
cell that is living on its own.
(Example: Bacteria)
• Multicellular organism can exist
only as a group of cells and that
can only survive when part of
the whole organism.
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22. Advantages of being
Multicellular:
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23. Advantages of being
Multicellular:
• Larger size means that there are
fewer predators.
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24. Advantages of being
Multicellular:
• Larger size means that there are
fewer predators.
• Longer life because the individuals
life span is not limited to one cell’s
existence.
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25. Advantages of being
Multicellular:
• Larger size means that there are
fewer predators.
• Longer life because the individuals
life span is not limited to one cell’s
existence.
• Specialization makes the organism
more efficient.
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26. Levels of Living Things:
• Organism- one living individual
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27. Population
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28. Population
• A Population is a group of
organisms that are the same
kind and that live in the same
area.
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29. Community
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30. Community
• A Community is two or more
different populations living in
the same area.
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31. Ecosystem
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32. Ecosystem
• An Ecosystem is
the community
and all of the
nonliving things
that affect it, such
as water, soil,
rocks, light, and
temperature.
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33. 01-05-03 15

34. Put It All Together!
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35. Put It All Together!
Cell
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36. Put It All Together!
Cell
Tissue
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37. Put It All Together!
Cell
Tissue
Organ
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38. Put It All Together!
Cell
Tissue
Organ
Organ System
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39. Put It All Together!
Cell
Tissue
Organ
Organ System
Organism
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40. Put It All Together!
Cell
Tissue
Organ
Organ System
Organism
Population
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41. Put It All Together!
Cell
Tissue
Organ
Organ System
Organism
Population
Community
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42. Put It All Together!
Cell
Tissue
Organ
Organ System
Organism
Population
Community
Ecosystem
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