Figures 3.13


Generalized insect alimentary canal showing division into three regions.
Figures 3.13. Generalized insect alimentary canal showing division into three regions.

The cuticular lining of the foregut and hindgut are indicated by thicker black lines. (After Dow 1986)

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  The four major categories of insect feeding specialization.
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  Preoral and anterior foregut morphology in (a) a generalized orthopteroid insect and (b) a xylem-feeding cicada.