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Six levels of orginzation
Chemical, cell, tissue, organ, organ system, and whole organism levels
Chemical level
Involves interactions between atoms
Cell
Basic structural and functional units of plants and animals
Organelles or little organs
Small structures that make up cells
Tissue
Comprised of a group of similar cells and the materials surrounding them
Organ
Composed of two or more tissue types that perform one or more common functions
Organ system
Group of organs that together perform a common function or set of functions and are thereby viewed as a unit
Organism
Any living thing considered as a whole
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