The Viscera, Including the Heart Volume 2

The Viscera, Including the Heart Volume 2

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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1914 edition. Excerpt: ...collected by two main trunks at each hilus. The branches of the pulmonary artery entering each hilus are accompanied by sir all branches of the aorta, the bronchial arteries. They supply the walls of the bronchial ramifications; their capillaries or venous radicals are apparently tnconstant in their termination, some of them passing into the vena azygos. The numerous lymphatic vessels of the lungs pass first to the pulmonary lymphatic glands situated in the neighborhood of the hilus, and from these to the higher bronchial lymphatic glands (see page 100). Very small lymphatic glands are also situated beneath the visceral pleura. The nerves of the lung are furnished bv the vagus-which gives off numerous small trunks entering the hilus, and bv the sympathetic. lhe lungi and the entire respiratory tract are developed as a diverticulum from the embryonic foregut. This diverticulum is visible as a blind pocket in the third week of embryonic life, but this soon enlarges and exhibits indications of the subsequent larynx, trachea, and lungs. The diverticulum becomes constricted from what is subsequently the pharynx at the site of the aditus laryngis, and at the end of the fourth week of embryonic life the blind extremity of the respiratory diverticulum divides, and indicates the position of both lungs, which subsequently develop exactly like glands by a process of budding or sprouting. THE THYREOID GLAND." The thyreoid gland (Figs. 444, 451, and 452) has only topographic relations to the organs of the respiratory tract; in other respects it belongs to the ductless glands (glands with internal secretions). It is situated in the neck in front of the trachea and the lateral portions of the larynx, and is also partly in contact with the lateral wall...show more

Product details

  • Paperback | 98 pages
  • 189 x 246 x 5mm | 191g
  • Rarebooksclub.com
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236595440
  • 9781236595447