"someone give a
 rough list of all their
 function" 

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3075550/

This review says fat bodies in insects serve many of the same functions as the liver in higher animals.  ie metabolism, energy storage and release, contribute to making hemolymph, some hormonal activities.  While not specific to bees a google scholar search shows thousands of technical papers on fat bodies in various insects.

Dick

HL Mencken said: "The whole aim of practical politics is to keep the populace alarmed — and hence clamorous to be led to safety — by menacing it with an endless series of hobgoblins, all of them imaginary. "

--------------------------------------------
On Sun, 1/20/19, Jennifer Robin Berry <[log in to unmask]> wrote:

 Subject: Re: [BEE-L] our knowledge of Varroa
 To: [log in to unmask]
 Date: Sunday, January 20, 2019, 6:06 PM
 
 Question about the fat bodies in
 bees.
 Sammy came to our club last summer,
 and his talk was impressive. I know
 that
 varroa feeding on fat bodies is a game changer, but can
 in bees? Do they help break down toxins,
 too?
 
 Jennifer
 Berry
 Sausalito, CA
 Where
 spring looks to be about 2 weeks early...
 
             
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