pharyngeal membranes

pha·ryn·ge·al mem·branes

thin sheets, composed of ectoderm externally and endoderm internally, which separate the pharyngeal pouches from the overlying pharyngeal grooves in the early embryo.
Synonym(s): closing membranes

pha·ryn·ge·al mem·branes

(făr-injē-ăl membrānz)
Thin sheets, which separate pharyngeal pouches from overlying pharyngeal grooves in the early embryo.