The Anatomy & Physiology of the Blow-Fly (Musca Vomitoria Linn.); A Monograph

The Anatomy & Physiology of the Blow-Fly (Musca Vomitoria Linn.); A Monograph

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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. 1870 edition. Excerpt: ...and unite in pairs, until they open into the intestine, by two large ducts. They are very numerous, and occupy the dorsal portion of the abdomen; they have a beaded outline and contain irregular nucleated cells, yellow pigment, and fat granules. I have found oecasionaly dumb bell crystals in the bile tubes, but have failed to detect 1u'ic acid in them, either in the larva or image. Its peristaltic action is very vigorous and may be observed plainly in the smaller house fly, the sides of the abdomen of which are very transparent. It may be seen also in the immature Blow-fly. The large intestine is about four lines in length in the perfect insect, but exceeds an inch in the larva; it extends from the openings of the bile tubes to a double muscular sphincter or valve, which separates it from the rectum. It differs considerably in structure from the small intestine. Its muscular coat, especially the longitudinal fibres, is much more largely developed and its middle or membranous coat is covered on its intemal surface with a number of sharp spines, with broad bases, which project downwards, and somewhat resemble narrow shark's teeth. These processes become more blunt at the valve, between the large intestine and the rectum, and extend into the upper portion of that intestine; they afibrd an additional argument in favor of the membranous coat being continous with the protodenn. Both the large intestine and the rectum are lined with ordinary mucous tesselated epithelium. The rectum dilates into a pyriform cavity, just below the recto-colic valve, which contains the rectal papillae. Below this dilatation it becomes again constricted, and a well developed sphincter of circular fibres may be observed close to its outlet. It opens at the more

Product details

  • Paperback | 44 pages
  • 189 x 246 x 2mm | 95g
  • United States
  • English
  • black & white illustrations
  • 1236785215
  • 9781236785213