. Cunningham's Text-book of anatomy. Anatomy. 1130 THE DIGESTIVE SYSTEM. The mucous membrane of the tongue, like that of the rest of the mouth, is covered by stratified squamous epithelium. Glandulae Linguales.âNumerous small racemose glands are found scattered beneath the mucous membrane of the posterior third of the tongue ; and a small collection of similar glands is present at the margin, opposite the vallate papillae. Small serous glands are also found embedded in the dorsum near the vallate papillae, into the fossae of which their ducts open (Fig. 891). The chief collections of glandular
. Cunningham's Text-book of anatomy. Anatomy. 1130 THE DIGESTIVE SYSTEM. The mucous membrane of the tongue, like that of the rest of the mouth, is covered by stratified squamous epithelium. Glandulae Linguales.âNumerous small racemose glands are found scattered beneath the mucous membrane of the posterior third of the tongue ; and a small collection of similar glands is present at the margin, opposite the vallate papillae. Small serous glands are also found embedded in the dorsum near the vallate papillae, into the fossae of which their ducts open (Fig. 891). The chief collections of glandular tissue in the tongue, however, are found embedded in the muscle of the under surface, a little way posterior to the apex, on each side of the middle line (Fig. 892). They are known as the glandulae linguales anteriores of Blandin or Nuhn. These glands are displayed after removing, from the under surface of the tongue, the mucous membrane and a layer of muscle fibres about 2 mm. thick which is composed of fibres of the styloglossus and the longitudinalis inferior muscles a little distance behind the apex. The anterior lingual glands are oval in shape, often partly broken up by muscular fibres, and they measure from J to f in. (12 to 19 mm.) in length. They are mixed serous and mucous glands, and they open by three or four very small ducts on the inferior surface of the tongue. Vallate papillse Styloglossus Stylo-liyoid â Digastric vessels of side and dorsum - Lymph vessels of apex of ~*"c' tongue â * Afferents to mandibular-- _ glands Sublingual gland Submental glanc Mylo-hyoid cut Afferent to deep cervical gland Anterior belly of digastric (cut. Afferents to deep cervical glands from posterior third of tongue Common facial vein Upper deep cervical lymph glands Omo-hy oid -r. Fig. 894.âLymph Vessels of the Tongue (after Poirier and Cuneo, modified). Vessels.âThe chief artery is the lingual. This vessel passes forwards on each side medial to the hyoglossus muscle, and
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