. Comparative anatomy. Anatomy, Comparative. THE VASCULAR SYSTEM 385 spaces in the mesenchyma, and the mesenchymal cells surrounding them are converted into the endothelial lining of the lymphatic vessel. Since connexions with veins appear very early and the number of connexions. Fig. 322.—Lymphatic vessels and veins in a rabbit of fourteen days, eighteen hours; mm. The lymphatics are heavily shaded, x being a vessel along the left vagus nerve and y along the aorta. The large jugular lymph sac is in contact with the internal jugular vein, ; it passes to the junction of the external j
. Comparative anatomy. Anatomy, Comparative. THE VASCULAR SYSTEM 385 spaces in the mesenchyma, and the mesenchymal cells surrounding them are converted into the endothelial lining of the lymphatic vessel. Since connexions with veins appear very early and the number of connexions. Fig. 322.—Lymphatic vessels and veins in a rabbit of fourteen days, eighteen hours; mm. The lymphatics are heavily shaded, x being a vessel along the left vagus nerve and y along the aorta. The large jugular lymph sac is in contact with the internal jugular vein, ; it passes to the junction of the external jugular {) and sub- clavian veins, the latter being formed by the union of the primitive ulnar, , and external mammary veins, The mesenteric sac is in front of the vena cava inferior {) and below the renal anastomosis {). Other veins include AZ., azygos, v., vitelline; C, gastric; , superior mesenteric; etc. The figures indicate the position of the corresponding cervical nerves. (From Bremer"s "Text Book of ;) diminishes in later stages, it was formerly thought that lymphatics are outgrowths of veins. Today, however, this evidence seems less con- vincing than it did to earlier Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Neal, Herbert V. (Herbert Vincent), 1869-1940; Rand, Herbert W. (Herbert Wilbur), 1872-1960. Philadelphia : P. Blakiston's Son
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