buccopharyngeal membrane การใช้

With the further expansion of the brain, and the forward bulging of the pericardium, the buccopharyngeal membrane is depressed between these two prominences.
In embryogenesis, "'Rathke's pouch "'is an evagination at the roof of the developing mouth in front of the buccopharyngeal membrane.
By the growth of the head end of the embryo, and the formation of the cephalic flexure, the pericardial area and the buccopharyngeal membrane come to lie on the ventral surface of the embryo.
The buccopharyngeal membrane is created in the foregut and it is perforated during the 4th week of human development, creating the primitive mouth, whereas the cloacal membrane is created in the hindgut and it is perforated during the 8th week of human development, creating the primitive anus after the mouth opening has already been created.