A quarter of the feces is water, and most of the rest is protein, inorganic substances, fat, undigested dietary fiber, dehydrated digestive juice residue, cells and dead bacteria shed from the intestine, vitamins K and B. For farmers, manure can be used as a better organic fertilizer for crops.
Extended data:
Food is digested in the stomach, mainly through various digestive enzymes. The colon does not produce enzymes, only bacteria can digest them. There are many kinds of bacteria in the colon, including Escherichia coli 70%, anaerobic bacteria 20%, streptococcus, Proteus, staphylococcus, lactobacillus, spores and yeast.
There are few protozoa and spirochetes. The important function of intestinal bacteria is to produce substances needed by physiology. For example, vitamin K, vitamin B 1, B2, vitamin H, vitamin B 12, B6, tretinoin, folic acid, racemic pantothenic acid, etc. can be synthesized in the intestine in the absence of vitamins in food.
The rectum can also absorb water, a small amount of glucose, amino acids and drugs. Intestinal dysfunction, enteritis and infection will all affect absorption. When diarrhea occurs, intestinal peristalsis increases, absorption decreases, and in severe cases, a lot of vitamins, water and electrolytes can be lost. If normal, feces will form in the sigmoid colon, waiting for excretion.
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