. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. SALIVARY GLANDS. 425 can be felt in the floor of the mouth, and forms a prominent ridge which elevates the mucous membrane. Its long axis is from before backwards, following, in fact, the di- rection of the horizontal ramus of the jaw, to which the gland is applied. The inferior sur- face rests upon the mylo-hyoid muscle; the external is received into the sublingual fossa; the internal is in relation with the genio- hyo-glossus and hyo-glossus below, and the mucous membrane above, the upper edge being covered by the latt
. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. SALIVARY GLANDS. 425 can be felt in the floor of the mouth, and forms a prominent ridge which elevates the mucous membrane. Its long axis is from before backwards, following, in fact, the di- rection of the horizontal ramus of the jaw, to which the gland is applied. The inferior sur- face rests upon the mylo-hyoid muscle; the external is received into the sublingual fossa; the internal is in relation with the genio- hyo-glossus and hyo-glossus below, and the mucous membrane above, the upper edge being covered by the latter. It is shaped somewhat like an almond, flattened from side to side, having its large extremity anteriorly. It is more compact in front than behind, in which latter situation its component lobes are occasionally separated the one from the other, and exist under the form of distinct irregularly rounded glands, with separate ex- cretory ducts about a quarter of an inch in length, coming from their upper surface. The sublingual gland is from one inch and a half to two inches in its long axis, three quarters of an inch in the longest part of its vertical diameter, and about a quarter of an inch from side to side. It has a more granular feel, and its lobules, which are mutually connected by a very delicate areolar tissue, are more dis- tinct, harder, and smaller than in either the submaxillary or parotid. The ducts of the sublingual are very nume- rous, and their orifices can be seen without much difficulty, opening into the floor of the mouth, behind the movable papilla of Whar- ton's duct, and along the crest of mucous membrane which is elevated by the upper border of the gland from which they take their origin. They are extremely thin and delicate, and pour out, when pressure is made on the body of the gland, a distinctly viscid saliva. They range from one-tenth to one- third of an inch in length, vary much in their direction and relative situation, and are in number from 7 to
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