Human anatomy, including structure and development and practical considerations . ^ \-0 ^< V ^!^Z Surface view of mucous membrane of ileum. X 30. THE SMALL LNTKSTINK. 1641 The walls of the latter, however, are so closely applied to the nodules that the exist-ence of the pit is not at first evident. \illi are wantint^ over the prominence of thenodules ; likewise the glands of Liel)erkuhn, the orifices (jf which are arranjj^ed as a wreath around the nodules. The Fig. 1394- latter are ffjund as much on one side of the intestinal tube as onthe other. In structure the solitary nod-ules correspon
Human anatomy, including structure and development and practical considerations . ^ \-0 ^< V ^!^Z Surface view of mucous membrane of ileum. X 30. THE SMALL LNTKSTINK. 1641 The walls of the latter, however, are so closely applied to the nodules that the exist-ence of the pit is not at first evident. \illi are wantint^ over the prominence of thenodules ; likewise the glands of Liel)erkuhn, the orifices (jf which are arranjj^ed as a wreath around the nodules. The Fig. 1394- latter are ffjund as much on one side of the intestinal tube as onthe other. In structure the solitary nod-ules correspond to similar lymph-nodes in other localities, con-sistinj^ of a capsule of densertissue enclosing the delicate ade-noid reticulum which sujjportsthe characteristic lymphocyteswithin its meshes. Within thelarger nodules germ-centres,spherical or ellipsoidal in form,occupy the middle of the nodules;the germ-centres are, however,not constant, being present, as arule, in young subjects, but oftenabsent in old individuals. Agenerous blood-supply is pro-vided by the rich net-work of. Surface view of portion of mucous of ileum, showingPeyers patch and solitary lyiuph-tiociules. Natural size. small vessels which surrounds the nodules ; fine capillaries penetrate into their interior,but usually do not reach the centre of the nodes. Definite lymph-paths have notbeen demonstrated within the nodules, although a plexus of lymphatics surroundstheir exterior (Teichmann). Peyers patches (noduli lyraphatici aggregati) are collections of solitarylymph-nodules, the individual follicles being blended by intervening adenoid tissue,they are seen in the lower half of the small intestine, especially near the lower end(ileum) ; exceptionally they are found in the upper part of the jejunum in thevicinity of the duodenum. The patches appear as slightly raised, elongated ovals, Fig. 1395. Submucous fold supporting mucosa with villi
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Keywords: ., bookauthormc, bookcentury1900, bookdecade1910, booksubjectanatomy
