What are crypts of Leiberkuhn ?

These are tubular unbranched glandular pits present between villi. These secrete intestinal juice or succus entericus. 
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Draw a well labelled diagram of the section of the gut.


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What is diabetes ?

It is due to the deficiency of insulin hormone. The insulin hormone is secreted by pancreas and it controls the blood-sugar levels. 
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How diarrhoea affects digestion. 

Diarrhoea reduces the absorption of food. 

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What is the role of E-coli bacteria in digestion ?

E-coli bacteria live in colon of man. They synthesize vitamins and thrive on the undigested food and help in the absorption of food.  
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