pharyngeal pouches

(redirected from endodermal pouches)

pha·ryn·ge·al pouch·es

paired evaginations of embryonic pharyngeal endoderm, between the pharyngeal arches, extending toward the corresponding ectodermally lined pharyngeal grooves; during development they evolve into epithelial tissues and organs, such as thymus and thyroid glands.

pharyngeal pouches, the four pairs of evaginations from the lateral walls lining the pharynx between the branchial arches in a developing embryo.
References in periodicals archive ?
Adjacent arches are separated externally by ectodermal branchial clefts or grooves and internally by endodermal pouches.