part of part of chordate pharynx tonsillar ring The circular lymphoid tissue formed by the lingual, pharyngeal, and faucial tonsils. Waldeyer's ring UBERON:0001735 oropharyngeal lymphoid tissue Waldeyer's tonsillar ring SCTID:56411004 anulus lymphoideus pharyngis pharyngeal lymphatic ring pharyngeal lymphoid ring Wikipedia:Waldeyer's_ring FMA:55070 NCIT:C73468 MA:0000752 gut-associated lymphoid tissue