This is the latest accepted revision, reviewed on 16 September 2018. Human feces photographed in a toilet, shortly after defecation. In the medical literature, the term “stool” is more commonly used than “feces”. Human feces together with human urine are collectively referred to as human waste or human excreta. The Bristol stool scale is a medical aid designed to classify the form of human feces into seven categories. Sometimes referred to in the UK as the Meyers Scale, it was developed by K. Heaton at the University of Bristol and was first published in the Scandinavian Journal of Gastroenterology in 1997. Types 1 and 2 indicate constipation. Types 3 and 4 are optimal, especially the latter, as these are the easiest to pass. 7 are associated with increasing tendency to diarrhea or urgency.
Meconium is a newborn baby’s first feces. Human fecal matter varies significantly in appearance, depending on diet and health. Feces can be black due to the presence of red blood cells that have been in the intestines long enough to be broken down by digestive enzymes. This is known as melena, and is typically due to bleeding in the upper digestive tract, such as from a bleeding peptic ulcer. Prussian blue, or blue, a coloring used in the treatment of radiation, cesium, and thallium poisoning, can turn the feces blue. Feces can be green due to having large amounts of unprocessed bile in the digestive tract and strong-smelling diarrhea. This can occasionally be the result from eating liquorice candy, as it is typically made with anise oil rather than liquorice herb and is predominantly sugar. Violet or purple feces is a symptom of porphyria. Feces possess physiological odor, which can vary according to diet and health status.
For example, meat protein contains a lot of the sulfur-containing amino acid methionine, which is a precursor of the sulfur-containing odorous compounds listed below. In this study it was found that activated charcoal at a dose of 0. 52g four times a day did not appreciably influence the liberation of fecal gases. On average humans eliminate 128 g of fresh feces per person per day with a pH value of around 6. Protein and fat come from the colon due to secretion, epithelial shedding and gut bacterial action. These proportions vary considerably depending on many factors such as mainly diet and body weight. The remaining solids are composed of calcium and iron phosphates, intestinal secretions, small amounts of dried epithelial cells, and mucus. The Fecal pH test for healthy humans is a pH of 6. Sometimes food may make an appearance in the feces.
Common undigested foods found in human feces are seeds, nuts, corn, and beans, mainly because of their high dietary fiber content. Beets may turn feces different hues of red. Artificial food coloring in some processed foods, such as highly colorful packaged breakfast cereals, can cause unusual coloring of feces if eaten in sufficient quantities. Undigested objects such as seeds can pass through the human digestive system, and later germinate. One result of this is tomato plants growing where treated sewage sludge has been used as fertilizer. The feces can be analyzed for various markers that are indicative of various diseases and conditions. Also, feces may be analyzed for any fecal occult blood, which is indicative of a gastrointestinal bleeding. A quick test for fecal contamination of water sources or soil is a check for the presence of E. Fecal contamination of water sources is highly prevalent worldwide, accounting for the majority of unsafe drinking water.
In developing countries most sewage is discharged without treatment. It occurs when insufficient fluid is absorbed by the colon. As part of the digestion process, or due to fluid intake, food is mixed with large amounts of water. Thus, digested food is essentially liquid prior to reaching the colon. The colon absorbs water, leaving the remaining material as a semisolid stool. If the colon is damaged or inflamed, however, absorption is inhibited, and watery stools result. Diarrhea is most commonly caused by a myriad of viral infections but is also often the result of bacterial toxins and sometimes even infection. In sanitary living conditions and with ample food and water available, an otherwise healthy patient typically recovers from the common viral infections in a few days and at most a week.
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I know sitting is bad, so lots of blood in stool hemorrhoids main cause for the pain is eliminated.