The Anatomy and Development of the Systematic Lymphatic Vessels in the Domestic Cat

The Anatomy and Development of the Systematic Lymphatic Vessels in the Domestic Cat

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1911 edition. Excerpt: ...ventro-mesad of the left vagus nerve and its encircling vein is a venous radicle (4) almost completely surrounded by an extraintimal lymphatic space (5) in the process of replacing the atrophying vein with which it is so closely associated. The same structures (4, 5) are seen still more clearly defined in the corresponding position on the right side of the embryo. Comparisonwith the corresponding sections just given in figures 103 to 109 show that the extraintimal anlage of the earlier stages, developed along the identical venous radicle, has increased in the 13.5 mm. stage, so as to nearly envelop the vein, and that the latter, if followed cephalad and caudad, is now separated from the functional venous channels of this region and is in the process of further recession and degeneration as the lymphatic perivenous space enlarges and more and more replaces the antecedent venous channel. The vein in question in the older embryo (series 189) appears collapsed and shrunken, and contains only a few degenerating red blood cells. In the same situation on the right side of fig. 110 (series 189, slide viii, section 35)., the section has cut the corresponding vein and the enveloping extraintirr al space at right angles, so that the central kernel of the shrinking vein (4), still containing a few degenerating red blood cells, is nearly completely surrounded by the replacing extraintimal lymphatic (5). Fig. 111 shows the following section of the same embryo (series 189, slide viii, section 36), magnified 225 diameters, in a larger field which gives the topographical relations and may serve in in the orientation of the succeeding plates. The ventral cir(umference of the oesophagus (8) and the aorta (7) are seen dorsally. The trachea (9), with the more

Product details

  • Paperback | 66 pages
  • 189 x 246 x 4mm | 136g
  • United States
  • English
  • black & white illustrations
  • 1236911148
  • 9781236911148