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CHAPTER VI. 
ANATOMY AND PHYSIOLOGY. 
ABDOMEN (continued). PHYSIOLOGY OF DIGESTION, DIGESTIVE ORGANS. 
GLANDULAR SYSTEM. REPRODUCTIVE ORGANS. STING. 
THE digestive and reproductive organs, which oc- 
cupy the chief space of the abdominal cavity, are, for 
the most part, fairly open to ordinary observation. 
Though we may derive the greatest assistance from 
the labours of preceding anatomists in displaying the 
details of their structure, yet, in this investigation, 
we do not find ourselves at once entirely beyond our 
own resources. And we shall need to take much 
less on the faith of others’ dissections here than in 
the last chapter. 
THE DIGESTIVE ORGANS of Insects deal with the 
same kind of substances as do those of the higher 
animals. Their food is reducible to the same classes 
‘of aliment, animal or vegetable, nitrogenous or non- 
nitrogenous, and the same chemical principles are at 
work in all alike. The difference of the results 
depends on the different application which is made 
of the elaborated material, and on the peculiar nature 
of the animal. This peculiar nature of the animal 
has a very wide application, for insects of one kind 
or another seem to eat anything and everything. 
