Question

Why reabsorption of water from the undigested food in the hindgut of cockroach necessary

Answer 1

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Here is your answer,

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The hindgut is not only a posterior extension of the alimentary canal, but it also plays a major role in excretion through secretion of some substance into the lumen, and reabsorption of useful substances such as ions, water and some nutrients from the Malpighian tubule effluent.

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Answer 2

The nutrients remaining in the food is reabsorbed and the excreted material should be dry.

Explanation:

The re absorption of the remaining nutrients is necessary so the water is absorbed from the undigested food and the excreted material is dry.

The illeum part of the hindgut is narrow and small and absorbs the remaining nutrients.

It is the highly coiled structure which helps in drying of the fecal matter.

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