Buccopharyngeal membrane

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Buccopharyngeal membrane
Gray977.png
Human embryo about fifteen days old. Brain and heart represented from right side. Digestive tube and yolk sac in median section. (Buccopharyngeal membrane labeled in upper left.)
Gray's subject #6 47

The region where the crescentic masses of the ectoderm and endoderm come into direct contact with each other constitutes a thin membrane, the buccopharyngeal membrane (or oropharyngeal membrane), which forms a septum between the primitive mouth and pharynx. In front of the buccopharyngeal area, where the lateral crescents of mesoderm fuse in the middle line, the pericardium is afterward developed, and this region is therefore designated the pericardial area.

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 As such, some of the information contained within it may be outdated.

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