oral plate


or·al plate

a circumscribed area of fusion of foregut endoderm and stomodeal ectoderm in the embryo that ruptures early in development to establish the oral opening.
See also: buccopharyngeal membrane.

oropharyngeal membrane

A 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.

or·al plate

(ōrăl plāt) Circumscribed area of fusion of foregut endoderm and stomodeal ectoderm in the embryo that ruptures early in development to establish oral opening.
See also: buccopharyngeal membrane