The Circulation reference article from the English Wikipedia on 24-Apr-2004 (provided by Fixed Reference: snapshots of Wikipedia from wikipedia.org)

Circulation

The word circulation can mean the following:

• The transport of blood through the circulatory system is called circulation (physiology).
• Movement of gas or fluid through a physical circuit (such as air through ventilated building) or an imaginary one (such as money through the economy).
• The readership of a periodical.

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