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] feces]]

'''Feces''', '''faeces''', or '''fæces''' (see ]), also known as '''excrement''', is a ] from an animal's ] expelled through the ] or ] during '']''.

==Etymology==
The word ''faeces'' is the plural of the ] word ''fæx'' meaning "dregs". There is no singular form in the English language, making it a ].<ref></ref>
There are many colloquial terms for feces, of which some are considered ] (such as '']'' and ''crap'') while others (such as ''poo'', ''poop'', ''number two'', ''deuce'', ''doodoo'', ''dookie'' and ''doody'') are not. Terms such as ''dung'', ''scat'', ''spoor'' and ''droppings'' are normally used to refer to animal feces.

''Stool'' is a common term normally used in reference to ]. For example, in ] to diagnose the presence or absence of a medical condition, a ] is sometimes requested for testing purposes. The term "stool" can also be used for that of non-human species.

==Ecology==
] disperses plant seeds via its feces.]]
] feces aid in provision of minerals and plant nutrients in an accessible form]]
After an animal has digested eaten material, the remains of that material are expelled from its body as waste. Though it is lower in energy than the food it came from, feces may still contain a large amount of energy, often 50% of that of the original food.<ref name=Campbell>''Biology'' (4th edition) N.A.Campbell (Benjamin Cummings NY, 1996) ISBN 0-8053-1957-3</ref> This means that of all food eaten, a significant amount of energy remains for the decomposers of ecosystems. Many organisms feed on feces, from bacteria to fungi to insects such as ]s, which can ] odors from long distances.<ref>{{cite journal |doi=10.1038/scientificamerican1179-146 |author=Heinrich B, Bartholomew GA |title=The ecology of the African dung beetle |journal=] |volume=241 |issue= 5|pages=146–56 |year=1979}}</ref> Some may specialize in feces, while others may eat other foods as well. Feces serve not only as a basic food, but also a supplement to the usual diet of some animals. This is known as ], and occurs in various animal species such as young elephants eating their mother's feces to gain essential ], or by other animals such as dogs, rabbits, and monkeys.

Feces and urine, which reflect ] light, are important to raptors such as ]s, which are able to locate their prey by their ]s and territorial markers.

]s may also be found in feces. Animals which eat ] are known as ]s. The advantage for a plant in having fruit is that animals will eat the fruit and unknowingly disperse the seed in doing so. This mode of ] is highly successful, as seeds dispersed around the base of a plant are unlikely to succeed and are often subject to heavy ]. Provided the seed can withstand the pathway through the digestive system, it is not only likely to be far away from the parent plant, but is even provided with its own fertilizer.

Organisms which subsist on dead organic matter or '']'' are known as ]s, and play an important role in ecosystems by recycling organic matter back into a simpler form which plants and other ]s may once again absorb. This cycling of matter is known as the ]. To maintain nutrients in soil it is therefore important that feces return to the area from which they came, which is not always the case in human society where food may be transported from rural areas to urban populations and then feces disposed of into a river or sea.
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==Human feces==
{{main|Human feces}}

In humans, defecation may occur (depending on the individual and the circumstances) from once every two or three days to several times a day. Extensive hardening of the feces may cause prolonged interruption in the routine and is called ].

] fecal matter varies significantly in appearance, depending on diet and health. Normally it is semisolid, with a ] coating. Its brown coloration comes from a combination of ] and ], which comes from dead ].

In newborn babies, fecal matter is initially yellow/green after the ]. This coloration comes from the presence of ] alone. In time, as the body starts expelling bilirubin from dead red blood cells, it acquires its familiar brown appearance, unless the baby is ], in which case it remains soft, pale yellowish, and not completely malodorous until the baby begins to eat significant amounts of other food.

Throughout the life of an ordinary human, one may experience many types of feces. A "green" stool is from rapid transit of feces through the intestines (or the consumption of certain blue or green food dyes in quantity), and "clay-like" appearance to the feces is the result of a lack of bilirubin.

] overload is very rare, and not a health threat. Problems as simple as serious ] can cause blood in one's stool. Black stools caused by blood usually indicate a problem in the intestines (the black is digested blood), whereas red streaks of blood in stool are usually caused by bleeding in the rectum or anus.

Food may sometimes make an appearance in the feces. Common undigested foods found in human feces are seeds, nuts, corn and beans, mainly because of their high ] content. Beets may turn feces different hues of red. Artificial food coloring in some processed foods such as highly colorful packaged breakfast cereals can also cause unusual feces coloring if eaten in sufficient quantities.

Laboratory examination of feces, usually termed as stool examination or ], is done for the sake of diagnosis, for example, to detect presence of parasites such as ]s and/or their eggs (ova) or to detect disease spreading bacteria.

=== Personal hygiene ===
{{main|Anal cleansing}}

Cultures employ a variety of personal cleansing practicing after elimination.
* In ] and ]n societies, the use of ] is widespread. Other paper products were also used before the advent of flush toilets.
* Some ]an countries use a ] for additional cleaning.
* In ] and ], showers are provided for use in toilets.
* In ], washing of the anus with water using the left hand is part of the prescribed ritual ablutions.
* In ], the anus is also washed with water using the left hand.
* In the ], the ] was adapted as the "WC" (water closet) and widely deployed in ] during the reign of ]. London suffered numerous outbreaks of ] resulting from workers handling food after using the toilet. Cleansing of the anus was an arbitrary practice left to personal choice and facilities available.
* In ], a communal sponge was employed. It was rinsed in a bucket of salt water after use.
* In ], flat sticks were used in ancient times, being replaced by toilet paper as the country became more ]. Toilets that include built-in bidets have now become widely popular in private homes; these can be very sophisticated appliances, allowing users to adjust the temperature, direction and force of water jets, and offering warm air to dry the anus and surrounding regions. The toilet flushes automatically when the buttocks leave the seat.

=== Health issues ===
Consistency and shape of stools may be classified medically according to the ].

], a disorder where non-food items are eaten, can cause unusual stool.

]s and their ] (eggs) can sometimes be visible to the ].

== Odor ==
] ] contributes to the smell of feces.]]
The distinctive ] of feces is due to ] action. ] produce compounds such as ], ], and ]s (]-containing compounds), as well as the inorganic gas ]. These are the same compounds that are responsible for the odor of ]. Consumption of foods with spices may result in the spices being undigested and adding to the odor of feces. The perceived bad odor of feces has been hypothesized to be a deterrent for humans, as consumption or touching it may result in sickness or infection.<ref>{{cite journal |author=Curtis V, Aunger R, Rabie T |title=Evidence that disgust evolved to protect from risk of disease |journal=Proc. Biol. Sci. |volume=271 Suppl 4 |issue= Suppl 4|pages=S131–3 |year=2004 |month=May |pmid=15252963 |pmc=1810028 |doi=10.1098/rsbl.2003.0144 |url=}}</ref> Of course, human perception of the odor is a ] matter; an animal that eats feces may be attracted to its odor.

== Pets ==
] ], ]]]
Pets can be trained to use litter boxes or wait to be allowed outside and defecate there. Training can be done in several ways, especially dependent on species. An example is crate training for dogs. Several companies market ] cleaning products aimed at pet owners.

== Uses ==
Human feces may be used as ] (See also: ]) in the form of ] (treated sewage sludge). The feces of animals are often used as ]; see ] and ]. Some animal feces, especially those of ], ] and ], is used as fuel when dried out.<ref>{{cite web|url=http://www.stcwa.org.au/index.php?option=com_content&task=view&id=798&Itemid=134|title=Dried Camel Dung as fuel}}</ref> Animal dung, besides being used as ], is occasionally used as a ] to make ] ] huts<ref>{{cite web |url=http://www.greenhouse.gov.au/yourhome/technical/fs34d.htm |title=Your Home Technical Manual – 3.4d Construction Systems – Mud Brick (Adobe) |accessdate=2007-07-09 |archiveurl = http://web.archive.org/web/20070706132354/http://www.greenhouse.gov.au/yourhome/technical/fs34d.htm <!-- Bot retrieved archive --> |archivedate = 2007-07-06}}</ref> or even in throwing sports such as cow pat throwing or camel dung throwing contests.<ref>{{cite web|url=http://www.abc.net.au/news/newsitems/200307/s900527.htm|title=Dung Throwing contests}}</ref> ] (pronounced {{IPA-may|ˈkopi ˈlu.aʔ|}}), or Civet coffee, is ] made from coffee berries which have been eaten by and passed through the digestive tract of the ] (''Paradoxurus hermaphroditus'').

See also ] for the use of feces in venery, or ] in the ], and ] for the use of feces in ] in ].

Dog feces were used in the tanning process of leather during the Victorian era. Collected dog feces were mixed with water to form a substance known as "bate". Enzymes in the dog feces helped to relax the fibrous structure of the hide before the final stages of tanning.<ref>http://www.yourdiscovery.com/history/worst_jobs/victorian/index.shtml</ref>

==Social implications==
Feces has always been associated with the lowest people among society, the social outcasts, the pariahs, the social discards. The Caste system in India was created along the lines of profession and the dalits (untouchables) were left to do work related to human emissions. They did such work as clean and pick feces from streets, clean toilets, work with dead bodies. Such practices are prevalent even today in the rural and small villages of India. Even in western cultures, feces is associated with social discards. The usage of the word "shit" in modern English has its roots in the use of the word to denote something that is of little value, even having a negative value sometimes.

== Animal feces ==
]]s in garbage]]
The feces of animals often have special names. For example:
*'''Non-human animals''' generally &ndash;
**As bulk material &ndash; dung
**Individually &ndash; droppings
*''']''' &ndash;
**Bulk material &ndash; ]
**Individual droppings &ndash; cow pats, meadow muffins etc.
*''']''' (and formerly other quarry animals) &ndash; ].
* '''Wild ]s''' &ndash; scat.
*''']''' &ndash; ].
*''']s''' (individual) &ndash; droppings (also include urine as white crystals of ]).
*''']s''' or ''']s''' (large accumulations) &ndash; ].
*'''Herbivorous ]s''', such as ]s and ]s &ndash; ].
*''']s''', ''']s''' etc. &ndash; ] (feces extruded at ground surface).
*'''Feces when used as ]''' (usually mixed with animal bedding and urine) &ndash; ].
*''']''' &ndash; horse manure, roadapple.

==Bibliography==
*{{cite book |author=Ganim, Russell; Persels, Jeff |title=Fecal matters in early modern literature and art: Studies in scatology |publisher=Ashgate |location=Aldershot, Hants, England |year=2004 |pages= |isbn=0-7546-4116-3 |oclc= 217420632 53477287 56448582|doi= |accessdate= |url=http://books.google.com/?id=0GKUQ-5o3qkC}}

== See also ==
{{Portal|Biology}}
<div style="column-count:2;-moz-column-count:2;-webkit-column-count:2">
* ]
* '']''
* ]
* ]
* ]
* ]
</div>

==References==
{{reflist}}

==Further reading==
* {{cite book |author=Laporte, Dominique G. |title=History of Shit (Documents Book) |publisher=The MIT Press |location=Cambridge, Mass |year=2002 |pages= |isbn=0-262-62160-6 |oclc= 42736232 49206444 53996841|doi= |accessdate=}}

==External links==
{{commons|Feces}}
{{wiktionary|feces}}
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*
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Revision as of 09:42, 13 January 2012

"Fecal Matter" redirects here. For the American grunge band, see Fecal Matter (band). Not to be confused with excretion.

Horse feces

Feces, faeces, or fæces (see spelling differences), also known as excrement, is a waste product from an animal's digestive tract expelled through the anus or cloaca during defecation.

Etymology

The word faeces is the plural of the Latin word fæx meaning "dregs". There is no singular form in the English language, making it a plurale tantum. There are many colloquial terms for feces, of which some are considered profanity (such as shit and crap) while others (such as poo, poop, number two, deuce, doodoo, dookie and doody) are not. Terms such as dung, scat, spoor and droppings are normally used to refer to animal feces.

Stool is a common term normally used in reference to human feces. For example, in medicine to diagnose the presence or absence of a medical condition, a stool sample is sometimes requested for testing purposes. The term "stool" can also be used for that of non-human species.

Ecology

The Cassowary disperses plant seeds via its feces.
Earthworm feces aid in provision of minerals and plant nutrients in an accessible form

After an animal has digested eaten material, the remains of that material are expelled from its body as waste. Though it is lower in energy than the food it came from, feces may still contain a large amount of energy, often 50% of that of the original food. This means that of all food eaten, a significant amount of energy remains for the decomposers of ecosystems. Many organisms feed on feces, from bacteria to fungi to insects such as dung beetles, which can sense odors from long distances. Some may specialize in feces, while others may eat other foods as well. Feces serve not only as a basic food, but also a supplement to the usual diet of some animals. This is known as coprophagia, and occurs in various animal species such as young elephants eating their mother's feces to gain essential gut flora, or by other animals such as dogs, rabbits, and monkeys.

Feces and urine, which reflect ultraviolet light, are important to raptors such as Kestrels, which are able to locate their prey by their middens and territorial markers.

Seeds may also be found in feces. Animals which eat fruit are known as frugivores. The advantage for a plant in having fruit is that animals will eat the fruit and unknowingly disperse the seed in doing so. This mode of seed dispersal is highly successful, as seeds dispersed around the base of a plant are unlikely to succeed and are often subject to heavy predation. Provided the seed can withstand the pathway through the digestive system, it is not only likely to be far away from the parent plant, but is even provided with its own fertilizer.

Organisms which subsist on dead organic matter or detritus are known as detritivores, and play an important role in ecosystems by recycling organic matter back into a simpler form which plants and other autotrophs may once again absorb. This cycling of matter is known as the biogeochemical cycle. To maintain nutrients in soil it is therefore important that feces return to the area from which they came, which is not always the case in human society where food may be transported from rural areas to urban populations and then feces disposed of into a river or sea.

Human feces

Main article: Human feces

In humans, defecation may occur (depending on the individual and the circumstances) from once every two or three days to several times a day. Extensive hardening of the feces may cause prolonged interruption in the routine and is called constipation.

Human fecal matter varies significantly in appearance, depending on diet and health. Normally it is semisolid, with a mucus coating. Its brown coloration comes from a combination of bile and bilirubin, which comes from dead red blood cells.

In newborn babies, fecal matter is initially yellow/green after the meconium. This coloration comes from the presence of bile alone. In time, as the body starts expelling bilirubin from dead red blood cells, it acquires its familiar brown appearance, unless the baby is breast feeding, in which case it remains soft, pale yellowish, and not completely malodorous until the baby begins to eat significant amounts of other food.

Throughout the life of an ordinary human, one may experience many types of feces. A "green" stool is from rapid transit of feces through the intestines (or the consumption of certain blue or green food dyes in quantity), and "clay-like" appearance to the feces is the result of a lack of bilirubin.

Bile overload is very rare, and not a health threat. Problems as simple as serious diarrhea can cause blood in one's stool. Black stools caused by blood usually indicate a problem in the intestines (the black is digested blood), whereas red streaks of blood in stool are usually caused by bleeding in the rectum or anus.

Food may sometimes 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 also cause unusual feces coloring if eaten in sufficient quantities.

Laboratory examination of feces, usually termed as stool examination or stool test, is done for the sake of diagnosis, for example, to detect presence of parasites such as pinworms and/or their eggs (ova) or to detect disease spreading bacteria.

Personal hygiene

Main article: Anal cleansing

Cultures employ a variety of personal cleansing practicing after elimination.

  • In Western and East Asian societies, the use of toilet paper is widespread. Other paper products were also used before the advent of flush toilets.
  • Some European countries use a bidet for additional cleaning.
  • In South Asia and Southeast Asia, showers are provided for use in toilets.
  • In Islam, washing of the anus with water using the left hand is part of the prescribed ritual ablutions.
  • In India, the anus is also washed with water using the left hand.
  • In the United Kingdom, the Indian toilet was adapted as the "WC" (water closet) and widely deployed in England during the reign of Queen Victoria. London suffered numerous outbreaks of food poisoning resulting from workers handling food after using the toilet. Cleansing of the anus was an arbitrary practice left to personal choice and facilities available.
  • In Ancient Rome, a communal sponge was employed. It was rinsed in a bucket of salt water after use.
  • In Japan, flat sticks were used in ancient times, being replaced by toilet paper as the country became more Westernized. Toilets that include built-in bidets have now become widely popular in private homes; these can be very sophisticated appliances, allowing users to adjust the temperature, direction and force of water jets, and offering warm air to dry the anus and surrounding regions. The toilet flushes automatically when the buttocks leave the seat.

Health issues

Consistency and shape of stools may be classified medically according to the Bristol Stool Scale.

Pica, a disorder where non-food items are eaten, can cause unusual stool.

Intestinal parasites and their ova (eggs) can sometimes be visible to the naked eye.

Odor

The molecule hydrogen sulfide contributes to the smell of feces.

The distinctive odor of feces is due to bacterial action. Gut flora produce compounds such as indole, skatole, and thiols (sulfur-containing compounds), as well as the inorganic gas hydrogen sulfide. These are the same compounds that are responsible for the odor of flatulence. Consumption of foods with spices may result in the spices being undigested and adding to the odor of feces. The perceived bad odor of feces has been hypothesized to be a deterrent for humans, as consumption or touching it may result in sickness or infection. Of course, human perception of the odor is a subjective matter; an animal that eats feces may be attracted to its odor.

Pets

Sign asking owners to clean up after pets, Downtown Houston, Texas

Pets can be trained to use litter boxes or wait to be allowed outside and defecate there. Training can be done in several ways, especially dependent on species. An example is crate training for dogs. Several companies market carpet cleaning products aimed at pet owners.

Uses

Human feces may be used as fertilizer (See also: Humanure) in the form of biosolids (treated sewage sludge). The feces of animals are often used as fertilizer; see manure and guano. Some animal feces, especially those of camel, bison and cattle, is used as fuel when dried out. Animal dung, besides being used as fuel, is occasionally used as a cement to make adobe mudbrick huts or even in throwing sports such as cow pat throwing or camel dung throwing contests. Kopi Luwak (pronounced Template:IPA-may), or Civet coffee, is coffee made from coffee berries which have been eaten by and passed through the digestive tract of the Asian Palm Civet (Paradoxurus hermaphroditus).

See also Fewmets for the use of feces in venery, or Hunting in the Middle Ages, and Kumalak for the use of feces in fortune-telling in Central Asia.

Dog feces were used in the tanning process of leather during the Victorian era. Collected dog feces were mixed with water to form a substance known as "bate". Enzymes in the dog feces helped to relax the fibrous structure of the hide before the final stages of tanning.

Social implications

Feces has always been associated with the lowest people among society, the social outcasts, the pariahs, the social discards. The Caste system in India was created along the lines of profession and the dalits (untouchables) were left to do work related to human emissions. They did such work as clean and pick feces from streets, clean toilets, work with dead bodies. Such practices are prevalent even today in the rural and small villages of India. Even in western cultures, feces is associated with social discards. The usage of the word "shit" in modern English has its roots in the use of the word to denote something that is of little value, even having a negative value sometimes.

Animal feces

Fresh bear scat showing a diet of apples
Bear scat showing consumption of bin bags in garbage

The feces of animals often have special names. For example:

Bibliography

See also

References

  1. Feces definition – Medical Dictionary definitions of popular medical terms easily defined on MedTerms
  2. Biology (4th edition) N.A.Campbell (Benjamin Cummings NY, 1996) ISBN 0-8053-1957-3
  3. Heinrich B, Bartholomew GA (1979). "The ecology of the African dung beetle". Scientific American. 241 (5): 146–56. doi:10.1038/scientificamerican1179-146.
  4. Curtis V, Aunger R, Rabie T (2004). "Evidence that disgust evolved to protect from risk of disease". Proc. Biol. Sci. 271 Suppl 4 (Suppl 4): S131–3. doi:10.1098/rsbl.2003.0144. PMC 1810028. PMID 15252963. {{cite journal}}: Unknown parameter |month= ignored (help)CS1 maint: multiple names: authors list (link)
  5. "Dried Camel Dung as fuel".
  6. "Your Home Technical Manual – 3.4d Construction Systems – Mud Brick (Adobe)". Archived from the original on 2007-07-06. Retrieved 2007-07-09.
  7. "Dung Throwing contests".
  8. http://www.yourdiscovery.com/history/worst_jobs/victorian/index.shtml

Further reading

External links

Categories: