THORAX ABDOMEN AND PELVIS

Detailed explanation-1: -Taste to the anterior two-thirds of the tongue is achieved through innervation from the chorda tympani nerve, a branch of the facial nerve (CN VII).

Detailed explanation-2: -Fungiform taste buds papillae: They are mushroom-shaped and located in the anterior two-thirds of the tongue. Circumvallate taste buds papillae: They are inverted V-shaped, larger and more complex, and are located in the posterior one-third of the tongue.

Detailed explanation-3: -The chorda tympani provides taste sensation from the anterior 2/3 tongue and also carries preganglionic parasympathetic nerve fibers that innervate the submandibular and sublingual salivary glands.

Detailed explanation-4: -The facial nerve is the 7th cranial nerve and carries nerve fibers that control facial movement and expression. The facial nerve also carries nerves that are involved in taste to the anterior 2/3 of the tongue and producing tears (lacrimal gland).