levels of organization identify cells, tissues, organs, organ systems, organisms, populations,...
TRANSCRIPT
Levels of Organization
• Identify cells, tissues, organs, organ systems, organisms, populations, communities, and ecosystems as levels of organization in the biosphere.
• Identify the levels of organization in the biosphere including cells, tissues, organs, and organ systems,
• as well as organisms, populations, communities, and ecosystems.
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.
Levels of Organization• Tissues—Groups of similar cells that
work together to perform a specific function.– 3 major tissue types in plants
• Transport tissue• Protective tissue• Ground tissue
– 4 major tissue types in animals• Epithelial tissue (Protective)• Connective tissue• Muscle tissue• Nervous tissue
Levels of Organization
• Organs—structures made of different types of tissues that work together to perform a specific function.– Examples
• Heart• Bone• Lungs• Stomach• Small intestine• Liver• Large Intestine• Gall Bladder• Plant Roots• Plant Stems• Plant Leaves
Levels of Organization• Organ Systems—Groups of organs that work
together to perform a specific function.– Examples:
• Digestive system
• Circulatory system
• Excretory system
• Respiratory system
• Nervous system
• Muscular system
• Skeletal system
• Integumentary system (skin)
• Endocrine system
• Immune system
• Reproductive system
• Vascular system in plants
Levels of Organization
• Organism—A complete, individual living thing.
• Examples:– A single person– A single plant– A single bacterium– A single protist
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.
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.
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…
Levels of Organization
• Biosphere—The region of Earth that supports all life. All of the environments and organisms on Earth.
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