Reference work entry
The middle portion of the gut, distinguished as being unprotected by cuticle but lined with a peritrophic membrane. In most insects the midgut is the principal site of digestion and absorption, and the source of digestive (Fig. 50) enzymes. Anatomically, the midgut commences after the proventriculus and terminates at the ileum and juncture of the Malpighian tubules.
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