Atrial canal

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Atrial canal
Dorsal surface of heart of human embryo of thirty-five days. (Atrial canal visible at center.)
Gray's subject #135 508

In the developing heart, the constriction between the atrium and ventricle constitutes the atrial canal, and indicates the site of the future atrioventricular valves.

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This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant.