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- W650804984 abstract "As a lymphoid organ was found in the vascular system, its anatomical and histological structure was studied. 1. The position of this organ differs slightly in the male and female. In the female, it is pressed by the ovary onto the upper anterior part of the liver. 2. An afferent and many efferent vessels led in and out are observed. The former is connected with the antennal artery and runs along the anterior edge of the liver to be led ultimately into the organ. In the female, the afferent vessel passes through the ovary. It is composed of an endothelial cell layer and surrounding loose fibrous tissue. Mesodermal reticular cells are scattered in this fibrous tissue. The efferent vessels emerging from several places of this organ usually expand to form cysts but those emerging from the anterior external edge and from the interior edge are tubiform. The former are connected to the upper part of the leucopoietic organ, dorsal epidermis, gonads, etc. The latter are linked with the lymphoid vessels below the cardiac stomach. The cystiform vessels complicatedly bending around the organ are linked with the lymphoid vessels, but the one linked with the liver tunica penetrates the small openings of the tunica into the liver. The efferent vessels are composed of adventitia of longitudinally running fibers and the intima of endothelial cells. 3. The afferent vessel is bifurcated progressively immediately after entering the organ, and each becomes the central artery of the sheath which is a structural unit of this organ. The spaces between the peri-arterial sheaths take the form of winding, interconnected sinuses. The wall of sinus is made up of sporadical endothelial cells and argyrophil lattice fibers. 4. The pulp of this organ is the peri-arterial sheath which surrounds the bifurcated artery in the organ. The wall of the central artery is made up of a layer of flat endothelial cells in which interstices are found. The peri-arterial sheath is composed of free cells and interstitial tissues which consist of reticular tissue and fibrous tissues. In fibrous tissues, argyrophil fibers are distributed in flagments and concentrically within the peri-arterial sheath, and collagenous fibers are distributed outside this layer of argyrophil fibers. 5. The greater part of the free cells in the peri-arterial sheath are lymph-like cells and distributed mainly in the argyrophil fiber layer. In this fibrous layer, there are observed certain cells which are believed to he their young cells. Moreover, these free cells are extruding into the arterial lumen through interstices in the endothelial cell layer. Lymph-like cells measure 2.5-4.0 μ in diameter and they have very thin cytoplasm, and nuclei which are stained well by haematoxylin especially at the peripheries. Discoid free cells, measuring 6.0-8.0 μ in diameter and poorly stained by the haematoxylin can also be recognized in the sinuses. Comparing these free cells with the lymphocyte-type cells produced in leucopoietic organ, which resemble each other most closely, the lymph-like cells are clearly distinguishable from the lymphocyte-types, but free cells in the sinuses can not be distinguished from them. 6. The lymph-like cells of the peri-arterial sheath frequently vary in quantity with the abnormal changes in the body. The peri-arterial sheath, as well as the central artery, is filled with lymph-like cells and their young cells. Besides this, the reticular cells of the peri-arterial sheath degeneratively fibers and a large amount of granules appear in the fibers. It can be further confirmed that those cells are released into the central artery." @default.
- W650804984 created "2016-06-24" @default.
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- W650804984 date "1969-01-01" @default.
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- W650804984 title "Studies on Penaeus orientolis KISHINOUYE-VIII" @default.
- W650804984 doi "https://doi.org/10.2331/suisan.35.245" @default.
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