[NatureNS] Spider Anatomy

Date: Fri, 05 Dec 2008 19:07:10 -0400
From: Peter Payzant <pce@accesswave.ca>
To: naturens@chebucto.ns.ca
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Ulli-

Thanks for the additional information. Really fascinating little 
creatures. I'm always glad to see them in my house.

Peter



uhoeger@dal.ca wrote:
> Most spider "knead" their prey as they work on digesting it, even the little 
> ones. Only few "specialists" liquefy and suck the whole thing empty through 
> a relatively small hole.  Venom and saliva secreted into and over the prey 
> contain enzymes that break down the tissue.  Not sure about the acid that 
> was mentioned, as digestion in arthropods in general happens at a fairly 
> neutral pH (unlike to human). Regurgitating acids may have negative effects 
> on your own tissue if it is not protected with a sacrificial mucus layer.
> If I remember I will look into that on Monday......
> The book "Biology of Spiders" is a good one with lots of spider biology in it.
>
> Ulli
>   
>   

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<font size="-1"><font face="Arial">Ulli-<br>
<br>
Thanks for the additional information. Really fascinating little
creatures. I'm always glad to see them in my house.<br>
<br>
Peter<br>
<br>
<br>
</font></font><br>
uhoeger@dal.ca wrote:
<blockquote cite="mid:49396A41.30069.35682E@uhoeger.dal.ca" type="cite">
  <pre wrap="">Most spider "knead" their prey as they work on digesting it, even the little 
ones. Only few "specialists" liquefy and suck the whole thing empty through 
a relatively small hole.  Venom and saliva secreted into and over the prey 
contain enzymes that break down the tissue.  Not sure about the acid that 
was mentioned, as digestion in arthropods in general happens at a fairly 
neutral pH (unlike to human). Regurgitating acids may have negative effects 
on your own tissue if it is not protected with a sacrificial mucus layer.
If I remember I will look into that on Monday......
The book "Biology of Spiders" is a good one with lots of spider biology in it.

Ulli
  </pre>
  <pre wrap="">
  </pre>
</blockquote>
</body>
</html>

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