Human feces

Human feces (or faeces in British English; Latin: fæx) are the feces (solid or semisolid metabolic waste) of the human digestive system, including bacteria. They vary significantly in appearance (i.e. size, color, texture), according to the state of the digestive system, diet and general health. Normally human feces are semisolid, with a mucus coating. Small pieces of harder, less moist feces can sometimes be seen impacted on the distal (leading) end. This is a normal occurrence when a prior bowel movement is incomplete, and feces are returned from the rectum to the intestine, where water is absorbed.

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. Containing human feces, and preventing spreading of pathogens from human feces via the fecal–oral route, are the main goals of sanitation.

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. W. Heaton at the University of Bristol and was first published in the Scandinavian Journal of Gastroenterology in 1997. The form of the stool depends on the time it spends in the colon.

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