What is Feces?
{{redirect|Scat|the form of singing|Scat singing}} '''Feces''' (or '''faeces'''), also called '''poo''', '''poop,''' or '''stool''' is the [[body]]'s solid waste left over from eating [[food]]. [[Human]] feces leave the [[human gastrointestinal tract|intestinal tract]] and are removed from the [[body]] through the [[anus]]. Feces are known for their unpleasant [[odor]]. The color, which can range from dark [[green]] through [[brown]] (the most common color) to bright [[yellow]], depends on a lot of different things; for example, different foods can change the color of feces, so can some illnesses, like [[diarrhea]]. The [[consistency]] of feces changes too. In [[human]]s it is measured using the [[Bristol stool scale]], a system for separating feces into seven different types. It is used for medical diagnosis. Although feces are generally thought to be [[wikt:waste|waste]], they actually have many uses. Feces are used by some scientists to follow [[animal]] [[wikt:population|populations]].<ref>{{cite web|url=http://news.mongabay.com/2009/0624-hance_tigers_feces.html|title=Saving tigers by counting feces|last=Hance|first=Jeremy|date=June 24, 2009|publisher=Mongabay.com|accessdate=2009-07-09}}</ref> Feces from [[Animal|animals]] and [[Human|humans]] can be used to create [[fertilizer]]s for plant [[crops]].<ref>{{Cite book|title=Ecological Sanitation|last=Esrey|first=Stephen|publisher=EcoSanRes, Stockholm Enrionment Institute|year=1998|isbn=|pages=}}</ref> Some feces are also used as a [[fuel]] for [[Fire|fires]]. Animals can also poop. In [[wikt:informal|informal]] language, there are many words for feces. These are often [[wikt:offensive|offensive]] or even [[wikt:vulgar|vulgar]]. In popular culture, there are a few [[Book|books]] about feces. Most of these books are for [[Child|children]]. One is called ''Everyone Poops''. It was written by Tarō Gomi, who is from [[Japan]].<ref>{{Cite web|title=Everyone Poops Book Review {{!}} Common Sense Media|url=https://www.commonsensemedia.org/book-reviews/everyone-poops