1.8: Themes and Concepts of Biology - …
https://bio.libretexts.org/Bookshelves/Introductory_and_General_Biology/Book:_General_Biology_(Boundless)/01:_The_Study_of_Life/1.08:__Themes_and_Concepts_of_Biology_-_Levels_of_Organization_of_Living_Things
The biological levels of organization of living things arranged from the simplest to most complex are: organelle, cells, tissues, organs, organ systems, organisms, populations, communities, ecosystem, and biosphere. Organelles: structures within cells that perform specific functions Cells: the basic units of life Tissues: groups of similar cells that work together Organs: structures composed of different tissues that perform a specific function Organ systems: groups of organs that coordinate to carry out a major function Organisms: individual living entities Populations: groups of organisms of the same species that live in the same area Communities: groups of different populations that interact with each other Ecosystems: communities and their nonliving environment Biosphere: the part of Earth where all life exists Many individual organisms can be organized into the following levels: cells, tissues, organs, and organs systems.
Organelles: structures within cells that perform specific functions
Cells: the basic units of life
Tissues: groups of similar cells that work together
Organs: structures composed of different tissues that perform a specific function
Organ systems: groups of organs that coordinate to carry out a major function
Organisms: individual living entities
Populations: groups of organisms of the same species that live in the same area
Communities: groups of different populations that interact with each other
Ecosystems: communities and their nonliving environment
Biosphere: the part of Earth where all life exists
Many individual organisms can be organized into the following levels: cells, tissues, organs, and organs systems.
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