Buccopharyngeal membrane
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

Over the crescentic masses of the ectoderm and endoderm come into direct contact with each other and constitute 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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• hednk-020a — Embryology at UNC

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 As such, some of the information contained within it may be outdated.

v • d • e Prenatal development/Mammalian development of digestive system (GA 11.1101) Gut Upper GI tract and accessory Stomodeum Foregut: upper GI (Buccopharyngeal membrane, Rathke's pouch, Tracheoesophageal septum) · accessory (Pancreatic bud, Hepatic diverticulum) Lower GI tract Midgut Hindgut: Urorectal septum Proctodeum Abdominopelvic Mesentery Dorsal mesentery · Ventral mesentery Thoracic diaphragm Septum transversum digestive system navs: anat of tract,glands,perit,diaphragm/physio/dev, noncongen/congen/congen of d+w/neoplasia, symptoms+signs/eponymous, proc