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a bilaminar (ectoderm and endoderm) membrane derived from the prechordal plate; after the embryonic head fold has evolved it lies at the caudal limit of the stomodeum.
See pharyngeal membrane.
oropharyngeal membraneA transient ectodermal membrane formed in embryos where the anterior aspect of the primitive gut contacts the abdominal wall, separating the depression of the stomadeum from the primitive pharynx. The membrane completely disappears by the 4th week, leading to communication between the stomadeum and pharynx.
buc·co·pha·ryn·ge·al mem·brane(bŭkō-făr-injē-ăl membrān)
pertaining to or emanating from the mouth and pharynx. Called also oropharyngeal.
these agents are widely used in human medicine but find little acceptance in the veterinary pharmaceutical field because of their difficulty of application.
imperforate buccopharyngeal membrane
a congenital defect of imperforation of the buccopharyngeal membrane. It prevents the animal from breathing through the nostrils and is incompatible with life. Called also choanal atresia.
a membrane present in fetal life which separates the nasal cavities from the pharynx.