. Anatomy, descriptive and applied. Anatomy. 1442 THE DUCTLESS GLANDS he arrives at the physiological conclusion that the thymus is one source of the colored blood eor|5uscles. Vessels and. Nerves.—The arteries supplying the thymus are derived from the interna] mammary and from the superior and inferior thyroid. The veins terminate in the two innom- inate veins, and in the internal mammary and the thyroid veins. The Ijrmphatics are of large size, arise in the substance of the gland, and are said to terminate in the internal jugular vein. The nerves are exceedingly minute; they are derived from
. Anatomy, descriptive and applied. Anatomy. 1442 THE DUCTLESS GLANDS he arrives at the physiological conclusion that the thymus is one source of the colored blood eor|5uscles. Vessels and. Nerves.—The arteries supplying the thymus are derived from the interna] mammary and from the superior and inferior thyroid. The veins terminate in the two innom- inate veins, and in the internal mammary and the thyroid veins. The Ijrmphatics are of large size, arise in the substance of the gland, and are said to terminate in the internal jugular vein. The nerves are exceedingly minute; they are derived from the vagus and sympathetic. Branches from the descendens hjrpoglossi and phrenic reach the investing capsule, but do not penetrate into the substance of the Fig, 1217.—Minute structure of the thymus gland. Lobule of injected thymus from a calf, four days old, slightly diagrammatic, magnified about 50 diameters. The large vessels are disposed in two rings, one of which surrounds the lobule, the other lies just within the margin of the medulla, A and B. From thymus of camel, ex- amined without addition of any reagent. Magnified about 400 diameters. A. Large, colorless cells containing small oval masses of hemoglobin. Similar cells are found in the Ijonph nodes, spleen, and medulla of bone. B. Colored blood corpuscles, (Watney.) Applied. Anatomy.—Sudden death—"thymus death"—with heart failure, and with or without acute respiratory embarrassment, has been recorded in a number of infants and children in whom the thymus was enlarged, and the lymphatic tissues throughout the body showed general hypertrophy, but who showed no other evidence of disease. Such deaths have often occurred during the administration of anesthetics. Primary tumors of the thymus are rare forms of mediastinal newgrowth, and are usually dermoids or lymphosarcomas. THE SPLEEN (LIEN) (Figs. 1218, 1219). The spleen is situated principally in the posterior portion of the left hypoclion- dr
Size: 1573px × 1588px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectanatomy, bookyear1913
