True statement about tongue epithelium are all except?: (A) At beginning -Endodermal (whole tongue), (B) Any External opening lined by Surface Ectoderm - Ant.2/3 of tongue, (C) At Sulcus Terminalis- Ectoderm and Endodermal junction, (D) Posterior 1/3rd - Mesodermal
Answer is D. Posterior 1/3 tongue is endodermal in origin . Tongue connective tissue and muscles- mesodermal in origin , connective tissue is derived from pharyngeal arches 1,2 and 3.