Levels of Organization

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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.

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Levels of Organization

• CellBasic 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.

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Levels of Organization

• TissuesGroups 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

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Levels of Organization

• Organsstructures 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

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Levels of Organization

• Organ SystemsGroups 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

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Levels of Organization

• OrganismA complete, individual living thing.
• Examples
• A single person
• A single plant
• A single bacterium
• A single protist

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Levels of Organization

• PopulationGroups 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.

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Levels of Organization

• CommunityAll 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.

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Levels of Organization

• EcosystemAll 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

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Levels of Organization

• BiosphereThe region of Earth that supports all
  life. All of the environments and organisms on
  Earth.

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