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Question

Which of the following is the correct composition of faeces?

A
25% water and 75% solid matter
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B
50% water and 50% solid matter
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C
33% water and 67% solid matter
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D
75% water and 25% solid matter
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Solution

The correct option is D 75% water and 25% solid matter
The undigested food with a lot of water content moves from the small intestine to the large intestine. In the large intestine as the undigested food passes through the colon a large quantity of water is absorbed. In the colon, the undigested matter is converted to feces.
The correct composition of the faeces is 75% water and 25% solid matter. The solid matter includes bacteria, carbohydrates, proteins, inorganic matter and the dry constituents of the digestive juices. Faeces are usually brown in colour and it is due to the presence of pigments stercobilin and stercobilinogen that are derived from bilirubin

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