Much of the medical information included in "Anathomia" is derived from commentaries on Hippocrates, Aristotle, and Galen written by Islamic scholars. Although Mondino makes frequent references to his personal dissection experiences, he nonetheless repeats numerous fallacies reported by these textual authorities. For example, he propagates the incorrect Galenic notion that a "rete mirabile" ("miraculous network") of blood vessels exists at the base of the human brain when it is in fact present only in ungulates. Other errors contained in "Anathomia" are the result of an attempt to reconcile the teachings of Galen and Aristotle. This is exemplified by Mondino's description of the heart: he combines Aristotle's notion of a triventricular heart with Galen's claim that a portion of the blood can flow directly from one side of the heart to the other though a permeable interventricular septum. He also propagates information about the human reproductive system that is not corroborated by anatomical evidence, including the existence of a seven-celled uterus with hornlike appendages.