B.10C Levels of Organization
Picture Vocabulary
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cell
The basic structural unit of all living
organisms
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tissue
A group of cells with a similar
structure and function
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organ
A group of tissues that perform
certain functions
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organ system
A group of organs that work
together to carry out a specific task
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organism
A living thing that portrays
the basic characteristics of life
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atom
Smallest component of an element that
has the properties of that element
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molecule
Smallest component of a substance that
has the properties of that substance; has
two or more atoms
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