![diagram of the heart YouTube diagram of the hear](https://i.ytimg.com/vi/2WwPcnjCKc4/hqdefault.jpg)
A diagram is usually a twodimensional display which communicates using visual relationships. It is a simplified and structured visual representation of concepts, ideas, constructions, relations, statistical data, anatomy etc. It may be used for all aspects of human activities to explain or illustrate a topic.
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