part of part of overlaps adjacent to pharyngeal arch pharyngeal pouch pharyngeal cleft UBERON:0005879 FMA:295672 sulcus pharyngei gill cleft An external pocketing of pharyngeal ectoderm that contacts a region of endoderm (a pharyngeal pouch) and interdigitates in the anterior and posterior directions by the pharyngeal arches. EMAPA:32750 pharyngeal groove ectoderm NCIT:C34250 branchial cleft pharyngeal ectodermal cleft AAO:0010623 Kiemenspalten pharyngeal groove branchial groove Wikipedia:Pharyngeal_groove surface groove pharyngeal ectoderm