Concept
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The Role of the Circulatory System
![Human heart](../../../../../../../../../figures.boundless-cdn.com/21408/full/art-and-circulatory-system.jpg)
Human heart
The heart is central to the human circulatory system, as it pumps blood throughout the body.
Source
Boundless vets and curates high-quality, openly licensed content from around the Internet. This particular resource used the following sources:
"Human Heart and Circulatory System."
http://en.wikipedia.org/wiki/File:Human_Heart_and_Circulatory_System.png
Wikipedia
CC BY-SA.