. Quain's elements of anatomy . er. Some of them open into the duct ofWharton. One, longer than the rest (which is occasionally derivedin part also from the submaxillary gland), runs along the Whartonianduct, and opens either with it or very near it; this has been namedthe diict of Bartholin, VOL. II. P P 578 THE SALIYART GLiJXDS. The blood-vessels of this gland are supplied by the sublingual and submentalarteries and veins. The nerves are numerous, and are derived from the lingualbranch of the fifth. STBtrCTUEE OF THE SALIVAEY GLANDS. These glands are constructed on the compound racemose type
. Quain's elements of anatomy . er. Some of them open into the duct ofWharton. One, longer than the rest (which is occasionally derivedin part also from the submaxillary gland), runs along the Whartonianduct, and opens either with it or very near it; this has been namedthe diict of Bartholin, VOL. II. P P 578 THE SALIYART GLiJXDS. The blood-vessels of this gland are supplied by the sublingual and submentalarteries and veins. The nerves are numerous, and are derived from the lingualbranch of the fifth. STBtrCTUEE OF THE SALIVAEY GLANDS. These glands are constructed on the compound racemose type. Theirducts (traced backwards), after branching a certain number of times,terminate in fine ramuscules, into which the alveoli open. The alveoli ofthe salivary glands do not always present the form usually regarded astypical of the alveoli of a compound racemose gland. They are some-times dilatations of the extremities of the duct beset with saccular en-largements, sometimes more tubular and even somewhat convoluted Fia;. Fig. 502.—Diagram op the construction of a LOBrLE of a tubulo-raceiiose(ACiNO-TtrBULAR) MUCOUS GLAND (from KoIIiker). a, duct; 6, a branch of the duct; c, alveoli as they lie together in the gland ; d, thesame separated, showing their connection as an irregular tube. without marked sacculation (fig. 502) (acino-tubular variety), but there isno essential difference between the two forms, transitions being met withbetween them. The alveoli are enclosed by a basement membrane, whichis not complete as in many glands, but forms a basket-like investment tothe alveolus, the flattened cells which form it, being ramified and unitedtogether by their branches (fig. 503). There is however in addition adelicate homogeneous substance occupying the meshes between the cells(see the left-hand alveolus in fig. 503). The cells of the basement mem-brane are said to send inwards processes to form a sustentacular networkamongst the alveolar cells. Fig. 503. Fig. 503.—Mem
Size: 2503px × 998px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., boo, bookcentury1800, booksubjectanatomy, booksubjecthumananatomy
