Fifty-one cadavers of human adults of both sexes were examined for the ramifications and site of opening of the cervical segment of the thoracic duct. It was found that the duct opened into veins of the neck through either one (84.31%) or two branches (15.69%). The most frequent site of opening was in the junction of the left internal jugular vein with the subclavian vein (18 individuals), but another frequent site (15 individuals) was in the internal jugular vein. The duct opened at the angle formed by the internal jugular vein and the internal posterior jugular vein in five individuals, and at a variety of the other locations in the remaining cadavers. These results are compared with the findings of previous investigators.
A description of the application of the classical Millon reaction as used to produce a differential stain for gray and white matter of the central nervous system is presented. The use of this technique for a gross anatomic study of the brain of the dog is discussed.
The gross anatomy of the portal vein (V. portae) and its tributaries was studied through anatomical methods, i.e. dissection, corrosion and diaphanization, in 45 opossums (Didelphis albiventris). In all animals the portal vein was formed by the junction of the cranial mesenteric, caudal mesenteric and lienal veins (V. mesenterica cranialis, V. mesenterica caudalis and V. lienalis, respectively). Many collateral tributaries were observed running into the portal venous trunk.
A histologic study of the retroperitoneal lymph vessels was carried out in the tufted capuchin (Cebus upella). The organization of the intima, media and surrounding adventitia is compared with that of other animals and man.
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