Concept
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The Role of the Circulatory System
Circulatory system is analogous to a highway system
Just as highway systems transport people and goods through a complex network, the circulatory system transports nutrients, gases, and wastes throughout the animal body.
Source
Boundless vets and curates high-quality, openly licensed content from around the Internet. This particular resource used the following sources:
"OpenStax College, Introduction. October 17, 2013."
http://cnx.org/content/m44800/latest/Figure_40_00_01.jpg
OpenStax CNX
CC BY 3.0.