You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is Anterior two third of the tongue is demarcated from the posterior one third by: plexus, 2-long thoracic plexus, 2-long thoracic and explain in detail?
Ans: B. Sulcus terminalis(Ref Gray's 41/e p5 I I, 40/e p503)Anterior two third of the tongue is demarcated from the posterior one-third by sulcus terminalis.Tongue:Divided by a V-shaped sulcus terminalis.Fuher divides tongue into,Anterior, oral (presulcal) pa facing upwards.Posterior, pharyngeal (postsulcal) pa facing posteriorly.Anterior pa forms about two-thirds of tongue length.