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About 99% of the large intestine and feces flora are made up of obligate anaerobes such as Bacteroides and Bifidobacterium. [35] Factors that disrupt the microorganism population of the large intestine include antibiotics, stress, and parasites. [5] Bacteria make up most of the flora in the colon [36] and accounts for 60% of fecal nitrogen. [6]
The gastrointestinal tract (GI tract, digestive tract, alimentary canal) is the tract or passageway of the digestive system that leads from the mouth to the anus.The GI tract contains all the major organs of the digestive system, in humans and other animals, including the esophagus, stomach, and intestines.
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).
The cecum is a pouch marking the division between the small intestine and the large intestine. It lies below the ileocecal valve in the lower right quadrant of the abdomen. [33] The cecum receives chyme from the last part of the small intestine, the ileum, and connects to the ascending colon of the large intestine. At this junction there is a ...
Diseases affecting the large intestine may cause blood to be passed with stool, may cause constipation, or may result in abdominal pain or a fever. Tests that specifically examine the function of the large intestine include barium swallows, abdominal x-rays, and colonoscopy. [5]: 913–915
Large intestine Acinetobacter calcoaceticus: Large intestine Actinomyces spp Mouth, small and large intestine Actinomyces viscosus: Mouth Actinomyces naeslundii: Mouth Aeromonas spp Large intestine, small intestine (Ileon) Aggregatibacter actinomycetemcomitans: Mouth Anaerobiospirillum spp Feces Alcaligenes faecalis: Large intestine, small ...