Georg Ebers papyrus from the U. S. National Medical Library at the National Institutes of Health. This papyrus recounts the case of a "tumor against the god Xenus." The recommendation is to "do thou nothing there against." It is also noted that the heart is the center of the blood supply, with vessels attached for every member of the body.

From http://en.wikipedia.org/wiki/Image:Ebers7766.jpg

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