File:The biology of dragonflies (Odonata or Paraneuroptera) (1917) (20388484651).jpg

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Title: The biology of dragonflies (Odonata or Paraneuroptera)
Identifier: biologyofdragonf00till (find matches)
Year: 1917 (1910s)
Authors: Tillyard, Robin John, 1881-1937
Subjects: Dragon-flies
Publisher: Cambridge (Eng. ) : University Press
Contributing Library: University of California Libraries
Digitizing Sponsor: Internet Archive

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110 THE ALIMENTARY AND EXCRETORY SYSTEMS (CH. be borne in mind that the normal state (a) represents a state of fasting. This is broken at irregular intervals by large and rapid meals, when the larva is fortunate enough to secure a victim. The larva can fast for long intervals without any danger of starvation^. In fact, as will presently be seen, the longer the larva fasts, the bigger becomes its capacity for deahng with the next meal when it does eventuate.
Text Appearing After Image:
Fig. 49. Part of epithelium of mid-gut in larva of .-I esc/i/ia sp. ( X 330). a. During period of rest. b. During period of preparation, c. During period of activity. bm basement membrane; 6.s balls of secretion; cm circular muscle; ib internal lamina of epithelium; Im longitudinal muscle; ns nests of developing cells; nu nucleus of epithelial cell; pm peritrophic membrane; yp yellow pigment granules. After Voinov. We may divide the process of digestion into three periods, (i) the normal period, or period of rest, (ii) the period of preparation, and (iii) the period of activity. (i) The 'period of rest. Fig. 49 a shews the appearance of the cells of the mid-gut, after the completion of digestion of a heavy meal. We have already described this state. We shall only add that, here and there, just within the basement membnme, there 1 I have kept larvae of Synthemis alive for three months without food.

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  • bookid:biologyofdragonf00till
  • bookyear:1917
  • bookdecade:1910
  • bookcentury:1900
  • bookauthor:Tillyard_Robin_John_1881_1937
  • booksubject:Dragon_flies
  • bookpublisher:Cambridge_Eng_University_Press
  • bookcontributor:University_of_California_Libraries
  • booksponsor:Internet_Archive
  • bookleafnumber:132
  • bookcollection:cdl
  • bookcollection:americana
  • BHL Collection
Flickr posted date
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7 August 2015

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current19:43, 19 September 2015Thumbnail for version as of 19:43, 19 September 20151,394 × 1,228 (370 KB)Fæ (talk | contribs)== {{int:filedesc}} == {{subst:chc}} {{information |description={{en|1=<br> '''Title''': The biology of dragonflies (Odonata or Paraneuroptera)<br> '''Identifier''': biologyofdragonf00till ([https://commons.wikimedia.org/w/index.php?title=Special%3ASea...

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