The Internal Secretory Organs

The Internal Secretory Organs

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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. 1913 edition. Excerpt: entodermal, is situated behind the pharyngeal membrane and is formed by an outgrowth, sometimes hollow and sometimes solid, of the cephalic intestine (preoral intestine), the blind end of which forms the pouch described by Seessel; the third or cerebral portion is provided by the infundibulum and infundibular gland. In the monorhines and myxinoids, the infundibular gland only is present, the palaeostoma forming the permanent nasopharyngeal passage. In Petromyzons, Elasmobranchii, and Teleosteii, the infundibular gland and the dorsal gland-complex of the naso-pharyngeal passage are both present. v. Kupffer's view is shared by Valenti and partly also by Nussbaum; but the inclusion of the entoderm in the formation of the hypophysis is denied by St. Remy in the case of birds and mammals, by Hoffmann in the case of Selachians, and by B. Haller in the case of all vertebrates. Valenti, who has carried out a fresh series of investigations with embryo chicks and rabbits, maintains the view, however, that the hypophysis contains an ecto-entodermal portion, derived from the preoral intestine. Corming and Rossi, on the other hand, insist upon a purely ectodermal origin. PHYSIOLOGY OF THE HYPOPHYSIS. Experimental Extirpation.--It was Horsley (1885) who, in order to compare the results of the removal of the hypophysis with those which follow thyroidectomy, first undertook the extirpation of that organ. His experiments, like those of Dastre (1889) and Gley (1891) were completely negative, the animals dying immediately after operation. Following the theory propounded by Marie and Marinesco concerning the pathogenesis of acromegaly, Marinesco (1892) next carried out extirpation experiments with cats. Since that date, hypophysectomy has been performed on...
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Product details

  • Paperback | 304 pages
  • 189 x 246 x 16mm | 544g
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236498542
  • 9781236498540