Definition composition formation and function of feces
Feces and faeces meaning are the same just spelling is different, and it is also known as excrement. It is a kind of solid bodily waste discharged from the large intestine via the anus during defecation. It is removed from the body one or two times a day depending on the individual condition. Feces excreted from the human adult body weighs about 100 to 250 grams ( Which is equal to three to eight-ounce).
Faeces Meaning - It is the waste matter eliminated from the bowels; excrement.
Feces are generally made of three-quarter of water and one-quarter of solid matter. In one-quarter of solid matter, it consists of about 30 percent of dead bacteria and 30 per cent consists of indigestible food matter like cellulose. And 10 to 20 per cent is cholesterol and other fats and another 10-20 per cent is an inorganic substance such as calcium phosphate and iron phosphate, finally leftover 2 - 3 per cent is protein.
The colour of the feces is brown due to the action of bacteria on bilirubin, which is the end product of haemoglobin (red blood cells) breakdown. The main reason behind the bad odour of the feces is caused by the chemicals indole, skatole, hydrogen sulphide, and mercaptans, all these chemicals are produced by bacterial action.
The function of the bowel is affected by many diseases and disorders that produce abnormalities in the feces. Constipation is characterized by one among them, in which infrequent evacuation of the feces occurs due to the production of excessively hard and dry feces. while diarrhoea results in frequent defecation and excessively soft, watery feces.
Some you can see blood in the stool, which is due to the bleeding in the stomach or intestine. The appearance of the stool containing blood appears dark red, tarry, or black. And when the stool is fatty or greasy it indicates pancreatic or small intestine afflictions. Some of the diseases like typhoid, cholera, and amoebic dysentery spreads by the contamination of food with the feces of the infected person.
Human Feces
The feces of the human depends on the individual and the several circumstances, human beings may defecate several times a day, every day, or once every two or three days. When the person is unable to poop for several days due to extensive hardening of the feces is known as constipation.
The faecal matter of the human being changes in appearance depending on the diet and the health of the individual, normally, the human feces are semisolid with a mucus coating. The typical brown colour of the feces is due to the combination of bile and bilirubin, which comes from the red blood cells.
Impacted Feces
When a person consumes the food, it is broken in the stomach and passes through the intestine., this process is also called digestion. The nutrients are absorbed from the body
And the remaining rate passes along with the colon and rectum.
In some rare cases, things might go wrong and the waste becomes stuck in the colon. assume, when you have an impacted colon, feces will become dry and won’t budge. Which makes it impossible to excrete them from your body, Impacted feces block the way for new waste to leave the body, causing it to back up.
Uses of the Animal Feces
Animal feces of some animals like guano and manure are often used as fertilizers.
In some of the places, dry animal dung is used as a fuel source. Some of the examples are camel, bison, and cattle, which are the source of fuel when dried.
Some of the animals like giant pandas and zebras produce biofuel from feces due to the presence of gut bacteria.
In rare cases, animal dung is also used as cement to make adobe mud-brick huts.
In places like northern Thailand, elephants are used to digest coffee beans in order to make black ivory coffee.
Feces of dog is used in the tanning process of the leather known as "pure", "puer", or "pewer", during the victoria era.
There are many beliefs of cow dung and urine having medicinal value, a belief of healing properties or as a food staple, and as told by politician Shankar Bhai Vegad in 2015, "I am witness to it, cow dung and urine is a 100 per cent cure for cancer".
Do You Know?
What are the reasons for the green feces?
1. You’re taking antibiotics.
2. You’ve had an infection, especially involving diarrhoea.
3. You have a liver or gastrointestinal illness.
4. You’re eating a ton of green veggies.
5. You’ve been consuming green dyes (think: frosting and ice cream).
6. You’re taking iron supplements.
7. You’re on the birth control shot.
FAQs on Feces in Human Digestive System
1. What is feces in biology?
Feces is the solid or semi-solid waste material expelled from the digestive tract through the anus after digestion and absorption are complete. It consists mainly of:
- Undigested food residues (such as dietary fiber)
- Bacteria from the large intestine
- Dead epithelial cells
- Water and mucus
- Bile pigments like stercobilin, which give stool its brown color
2. How are feces formed in the human body?
Feces are formed in the large intestine as water is absorbed from undigested food material. The process occurs in stages:
- Chyme enters the colon from the small intestine.
- Water and electrolytes are absorbed through the colon wall.
- Gut bacteria ferment remaining nutrients.
- The material becomes more solid and forms feces.
- Feces are stored in the rectum until defecation.
3. What is the main function of feces?
The main function of feces is to eliminate undigested and waste materials from the body. This removal is essential because it:
- Prevents buildup of indigestible substances
- Helps maintain digestive health
- Removes excess bacteria and metabolic waste
4. What are feces made of?
Feces are primarily made of water, bacteria, and undigested food particles. On average, human feces contain:
- About 75% water
- 25% solid matter
- Large amounts of intestinal bacteria
- Dietary fiber and dead cells
- Bile pigments such as bilirubin derivatives
5. Why are feces brown in color?
Feces are brown due to the presence of the bile pigment stercobilin. During digestion:
- The liver produces bile containing bilirubin.
- Bilirubin is modified by intestinal bacteria.
- It is converted into stercobilin in the large intestine.
6. What is the difference between feces and urine?
Feces and urine are different types of body waste eliminated by separate systems. The key differences are:
- Feces: Solid waste from the digestive system, expelled through the anus.
- Urine: Liquid waste produced by the kidneys, expelled through the urethra.
- Feces remove undigested food and bacteria.
- Urine removes nitrogenous wastes like urea and excess salts.
7. What role do bacteria play in feces?
Bacteria in feces are part of the normal gut microbiota and help in digestion and waste formation. Their roles include:
- Fermenting undigested carbohydrates
- Producing certain vitamins like vitamin K
- Breaking down bile pigments
- Contributing to the bulk of fecal matter
8. What is defecation?
Defecation is the process of expelling feces from the rectum through the anus. It occurs through coordinated steps:
- Feces accumulate in the rectum.
- Stretch receptors trigger the defecation reflex.
- Internal and external anal sphincters relax.
- Abdominal muscles contract to expel feces.
9. How does diet affect feces?
Diet directly affects the color, consistency, and frequency of feces. Key dietary influences include:
- Fiber-rich foods increase stool bulk and ease defecation.
- High-fat diets may change stool texture.
- Low water intake can cause hard stools.
- Certain foods can alter stool color.
10. Why is feces important in biology and ecology?
Feces are important in biology and ecology because they contribute to nutrient recycling and ecosystem balance. Their significance includes:
- Returning nutrients like nitrogen and phosphorus to soil
- Supporting decomposers such as bacteria and fungi
- Serving as a food source for some organisms (coprophagy)
- Helping scientists study animal diets and health
