Levels of Organization
The components of organisms can be divided into smaller units to examine life
on different levels of organization.
Cell
the smallest unit of life
Example: Bacteria
Tissue
cells that work together to perform a function
Example: Muscle Tissue
Organ
tissues that work together to perform a function
Example: Heart
Organ System
organs that work together to perform a function
Example: Circulatory
Organism
a living thing composed of a cell or cells and possibly tissues, organs, and
organ systems.
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