. The anatomical record. Anatomy; Anatomy. 82 CARBON GILLASPIE, L. I. MILLER, AND M. BASKIN plete degeneration when the mesonephros disappears. A vari- able number of them persist as phrenic, suprarenal, renal, acces- sory renal, internal spermatic, accessory spermatic arteries, and as the rami ad lympho-glandulas and ad sympatheticum. The first mesonephric arteries found in embryos mm. arise from the lateral surface of the aorta, and pass horizontally to the urogenital fold, reaching the malpighian corpuscles, and termi- nating in them with an enlargement which usually assumes a spherical
. The anatomical record. Anatomy; Anatomy. 82 CARBON GILLASPIE, L. I. MILLER, AND M. BASKIN plete degeneration when the mesonephros disappears. A vari- able number of them persist as phrenic, suprarenal, renal, acces- sory renal, internal spermatic, accessory spermatic arteries, and as the rami ad lympho-glandulas and ad sympatheticum. The first mesonephric arteries found in embryos mm. arise from the lateral surface of the aorta, and pass horizontally to the urogenital fold, reaching the malpighian corpuscles, and termi- nating in them with an enlargement which usually assumes a spherical shape. Later a network of vessels occupies the place of the enlargement. This network is also connected with the. Fig. 1 Mesonephric arteries in human embryo of 18 mm. greatest length. Circles on anterior surface of aorta indicate origin of coeliac, superior and inferior mesenteric arteries (after Keibel and Mall). posterior cardinal vein. Case IX is an example of the per- sistence of this anastomosis. With increasing age the arteries continually recede into the lumbar segments disappearing from the thoracic ones. The arteries are di\ into three groups bj'^ the suprarenal body: the cranial group, which is dorsal to the suprarenal {1-2); the middle group, whose vessels pass through the suprarenal {R. 3-~4, L. 3-5); and the caudal group whose vessels pass over the ventral side of the suprarenal body {R. 5-6, L. 6-9). The mesonephric arteries {5-9) situated in the angle formed by the reproductive gland ventrally, the mesonephros laterally, and the. 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 Bardeen, Charles Russell, 1871-1935, ed; Boyden, Edward A. (Edward Allen), 1886-1976; Bremer, John Lewis, 1874- ed; Hardesty, Irving, b. 1866, ed; American Association of Anatomists; American Society of Zoologists
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