1. Levels of Organization
Identify cells, tissues, organs, organ systems, organisms, populations, communities, and ecosystems as levels of organization in the biosphere.
ELIGIBLE CONTENT
Identify the levels of organization in the biosphere including cells, tissues, organs, and organ systems,
as well as organisms, populations, communities, and ecosystems.

2. December 11, 2012
Aim: to identify and describe the levels of organization in living things.
Homework: Bring in USB, dictionary, highlighters, Draft 2 of HPV Vaccine Essay with edits
Do Now: Name an organ system, organ, and cell we’ve studied this year.
Notes: Levels of Organization

4. Levels of Organization
Cell—Basic unit of structure and function in organisms.
Some organisms, like bacteria and protists, are unicellular (made entirely of one cell).
Some organisms, like fungi, plants, and animals, are multicellular (made of many cells).
Bacteria have prokaryotic cells.
Protists, Fungi, Plants, and Animals have eukaryotic cells.
In multicellular organisms, cells exhibit cell specialization. They take on specific jobs and look different from each other.
The cells also exhibit division of labor. They split up the work of the organism.

6. Levels of Organization
Tissues—Groups of similar cells that work together to perform a specific function.
4 major tissue types in animals
Epithelial tissue
Connective tissue
Muscle tissue
Nervous tissue

7. Levels of Organization
Organs—structures made of different types of tissues that work together to perform a specific function.
Examples
Heart
Lungs
Stomach
Small intestine
Liver
Large Intestine
Gall Bladder
Plant Roots
Plant Stems
Plant Leaves

8. Levels of Organization
Organ Systems—Groups of organs that work together to perform a specific function.
Examples:
Digestive system
Circulatory system
Respiratory system
Nervous system
Muscular system
Skeletal system
Integumentary system (skin)
Vascular system in plants

9. Levels of Organization
Organism—A complete, individual living thing.
Examples:
A single person
A single plant
A single bacterium
A single protist

11. Questions
Which diagram below represents one type of human tissue?

12. Questions

13. Levels of Organization
Population—Groups of organisms of the same species (kind) that live together in a particular area at a particular time.
Examples: All the mice in Buckhorn
All the people in New Market
All the earthworms in your flower bed.
All the roses in a rose garden.
All the mushrooms (of a particular kind) in a meadow.

14. Levels of Organization
Community—All of the populations of organisms that inhabit the same area at the same time.
Examples:
All of the species of grasses, insects, shrubs, mice, and bacteria that live in a particular field.

15. Levels of Organization
Ecosystem—All of the communities of organisms that inhabit an area as well as all of the nonliving components of the area that the organisms interact with. (Communities + Environment).
Examples:
All of the trees, plants, and animals in a forest plus all of the water, rocks, air, wind, etc…

16. Levels of Organization
Biosphere—The region of Earth that supports all life. All of the environments and organisms on Earth.

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