Spina vestibuli

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Spina vestibuli
Interior of dorsal half of heart from a human embryo of about thirty days. (Spina vestibuli labeled at center left.)
Gray's subject #135 510

Below the opening of the orifice of the coronary sinus they fuse to form a triangular thickening—the spina vestibuli.

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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 As such, some of the information contained herein may be outdated.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.