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Human microbiota are microorganisms (bacteria, viruses, fungi and archaea) found in a specific environment. They can be found in the stomach, intestines, skin, genitals and other parts of the body. [ 1 ]
Bacteria that degrade cellulose (such as Ruminococcus) are prevalent among great apes, ancient human societies, hunter-gatherer communities, and even modern rural populations. However, they are rare in industrialized societies. Human-associated strains have acquired genes that can degrade specific plant fibers such as maize, rice, and wheat.
Graphic depicting the human skin microbiota, with relative prevalences of various classes of bacteria. The human microbiome is the aggregate of all microbiota that reside on or within human tissues and biofluids along with the corresponding anatomical sites in which they reside, [1] [2] including the gastrointestinal tract, skin, mammary glands, seminal fluid, uterus, ovarian follicles, lung ...
The large intestine contains multiple types of bacteria that can break down molecules the human body cannot process alone, [40] demonstrating a symbiotic relationship. These bacteria are responsible for gas production at host–pathogen interface, which is released as flatulence. Intestinal bacteria can also participate in biosynthesis reactions.
The large intestine houses over 700 species of bacteria that perform a variety of functions, as well as fungi, protozoa, and archaea. Species diversity varies by geography and diet. [46] The microbes in a human distal gut often number in the vicinity of 100 trillion, and can weigh around 200 grams (0.44 pounds).
A gut that is rich in healthy bacteria may help reduce the risk of inflammatory diseases such as inflammatory bowel disease, irritable bowel syndrome, obesity, and colon cancer.”
Credit - Illustration by TIME; agung fatria/iStockphoto/Getty Images. S omewhere between 60 and 70 million Americans have digestive conditions like inflammatory bowel disease, acid reflux, chronic ...
Human feces photographed in a toilet, shortly after defecation.. Human feces (American English) or faeces (British English), commonly and in medical literature more often called stool, [1] are the solid or semisolid remains of food that could not be digested or absorbed in the small intestine of humans, but has been further broken down by bacteria in the large intestine.