Text-Book of the Embryology of Man and Mammals

Text-Book of the Embryology of Man and Mammals

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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. 1892 edition. Excerpt: ...of the alimentary tube. It is elongated and here and there undergoes fusion with the peritoneum of the body-cavity, by means of which it either acquires new points of attachment or in certain tracts wholly disappears; some portions of the intestine are thus deprived of their mesentery. 11. The mesentery of the duodenum, and in part also that of the colon ascendens and c. descendens, fuses with the wall of the body (extraperitoneal parts of the intestine). 12. The mesentery of the colon transversum acquires a new line of attachment running from right to left, and becomes differentiated from the common mesentery as mesocolon. 13. The mesogastrium of the stomach follows the torsions of the latter and is converted into the greater omentum, which grows out from the greater curvature of the stomach to cover over all the viscera lying below. 14. Fusions of the walls of the omentum with adjacent serous membranes take place: (1) on the posterior wall of the body, in consequence of which the line of origin from the vertebral column is displaced to the left side of the body; (2) with the mesocolon and colon transversum; (3) on the part of the sac which has overgrown the intestines, where its anterior and posterior walls come into close contact and fuse into an omental plate. C. Development of Special Organs out of the Walls of the Alimentary Tube. 1. The surface of the alimentary tube increases in extent inward by means of folds and villi, and by glandular evaginations outward. 2. There are developed, as organs of the oral cavity, the tongue, the salivary glands, and the teeth. 3. The teeth, which in the higher Vertebrates are found only at the entrance of the mouth, are distributed in the lower Vertebrates (Selachians, etc.) over the whole of the...
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Product details

  • Paperback | 250 pages
  • 189 x 246 x 13mm | 454g
  • Rarebooksclub.com
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236569628
  • 9781236569622