"intrinsic muscles of the tongue, which do not have attachments outside the tongue and whose action is to alter the shape of the tongue:"
"extrinsic muscles of the tongue which have attachments outside the tongue, and therefore their actions alter the position of the tongue:"
"The tongue is a complex, principally muscular structure that extends from the oral cavity to the oropharynx. It has important roles in speech, swallowing and taste."
"The tongue is covered by a mucosa, which is roughened on the dorsal surface covered by filiform, fungiform and circumvallate papillae. Posteriorly, the base of the tongue contains the lingual tonsils 4."
"mobile tongue: anterior two-thirds; part of the oral cavity"
"base of tongue: posterior one-third; fixed; part of the oropharynx"
"base of tongue: posterior one-third; fixed; part of the oropharynx"