Structure of the gut

There are three main regions to the insect gut (or alimentary canal), with sphincters (valves) controlling food-fluid movement between regions (Fig. 3.13). The foregut (stomodeum) is concerned with ingestion, storage, grinding, and transport of food to the next region, the midgut (mesenteron). Here digestive enzymes are produced and secreted and absorption of the products of digestion occurs. The material remaining in the gut lumen together with urine from the Malpighian tubules then enters the hindgut (proctodeum), where absorption of water, salts, and other valuable molecules occurs prior to elimination of the

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