Quain's elements of anatomy . hegland, separated from the rest by a thin layer of fascia, and some-times described as a distinct gland {glanduJa laclirymalis inferior ofRosenmiiller), is closely adherent to the back of the upper eye-lid, and iscovered on the ocular smface merely by the conjunctiva ; its lobules aresmall and separate, with minute ducts, some opening separately, othersjoining the ducts from the principal gland, which are also very number from both divisions of the gland seldom exceeds twelve orfourteen. After running obliquely under the mucous membrane, andseparating a
Quain's elements of anatomy . hegland, separated from the rest by a thin layer of fascia, and some-times described as a distinct gland {glanduJa laclirymalis inferior ofRosenmiiller), is closely adherent to the back of the upper eye-lid, and iscovered on the ocular smface merely by the conjunctiva ; its lobules aresmall and separate, with minute ducts, some opening separately, othersjoining the ducts from the principal gland, which are also very number from both divisions of the gland seldom exceeds twelve orfourteen. After running obliquely under the mucous membrane, andseparating at the same from each other, they open in a row at the fornixconjunctivse, by separate orifices, at its upper outer part. The lachrymal gland is a compound racemose gland resembling the salivaryglands in general stmcture. Its alveoli are bounded by a basement membraneformed of ramified flattened ceUs ; and the secreting cells exhibit changes in thedifferent states of rest and activity of the gland similar to those seen in most. 390 THE EYE. other glands (see p. 223). No rod-like structure has been noticed in the epitheliumof the ducts. Lachrymal canals.—These commence as already mentioned by aminute aperture {jnmduni) on tlie margin of each lid, near the innerangle (fig. 325, 1, 1). The upper canal is rather the smaller andlonger of the two : it first ascends from the punctum; then makes asudden bend, and is directed inwards and downwards to join the lach-rymal sac (fig. 325,2). The lower canal descends from the correspondingpunctum and then takes a nearly horizontal course inwards. Both canalsare dilated where bent. In some cases they unite near the end; more com-monly they open separately, but close together, into the sac. The lachrymal sac and nasal duct constitute together the passageby which the tears are conveyed from the lachrymal canals to the cavityof the nose. The laclirymal sac (fig. 325, 2), the slightly dilated upperportion of the passage, is situated at the side
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