Manual of human histology . sus and the mucous membrane, whichoccupies the whole breadth and length of thetongue and proceeds from the chondro-glossus(overlooked by most anatomists), which arisesfrom the smaller cornu of the hyoid bone asa moderately large bundle, separated from thebaseo- and cerato-glossus by the lingualartery and the glosso-pharyngeal nerve. Itpasses forwards, under the deep glandularlayer of the root of the tongue, and inpait through the midst of the terminationof the genio-glossus and lingualis inferior; oc-cupies, a little in front of the papillcs circum-vallata, almost t
Manual of human histology . sus and the mucous membrane, whichoccupies the whole breadth and length of thetongue and proceeds from the chondro-glossus(overlooked by most anatomists), which arisesfrom the smaller cornu of the hyoid bone asa moderately large bundle, separated from thebaseo- and cerato-glossus by the lingualartery and the glosso-pharyngeal nerve. Itpasses forwards, under the deep glandularlayer of the root of the tongue, and inpait through the midst of the terminationof the genio-glossus and lingualis inferior; oc-cupies, a little in front of the papillcs circum-vallata, almost the entire half of the tongue,and thence passes forwards in the form ofnarrow bundles, united here and there at acute angles, im-mediately under the mucous membrane, between the ends Fig. 171. Portion of a longitudinal section through the side of the human tongue:a,papillafungiformis; b,papilla filiformis; c, mucous membrane; (f, fibrous layerbelow it; e, longitudinalis superior; /, genio-glossus; g, transversus, cut THE TONGUi:. 13 of tlie gemo-glossi and hyo-glossi, as far as the point of tlietongue, here to become lost in the integument on its uppersurface. Since these longitudinal fibres become thicker ante-riorly, it is probable that independent, superior longitudinalfibres, arising from the mucous membrane of the dorsum ofthe tongue, and ending upon it, become associated with find perpendicular fibres, which do not arise from Avithout,only in the apex of the tongue, where delicate bundles of themare stretched between the upper and lower layers of mucousmembrane. The lamellse of the most anterior part of the transversus passbetween the inner portions of these bundles, whilst betweentheir extremities the longitudinalis superior and iiiferior andstylo-glossus penetrate with tolerable regularit}^, so that trans-verse sections exhibit an alternation of perpendicular and lon-gitudinal fibres, such as that which appears in the dorsal partof the tongue in fig. 170.
Size: 907px × 2754px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1850, booksubjecthistolo, bookyear1853
