THORAX ABDOMEN AND PELVIS

Detailed explanation-1: -Cellulolytic bacteria are key participants in this breakdown process of cellulose, which is otherwise indigestible by the host. They critically contribute to host nutrition and health through the production of short-chain fatty acids, in addition to maintaining the balance of intestinal microbiota.

Detailed explanation-2: -Bacteria in the first, or ascending, part of the colon are experts in breaking down carbohydrates (sugars and starches). They do this by fermentation, whose byproduct is the gases that exit the back passage as wind.

Detailed explanation-3: -The main types of bacteria in the colon are obligate anaerobes, and the most abundant bacteria are members of the genus Bacteroides, anaerobic gram-positive cocci, such as Peptostreptococcus sp., Eubacterium sp., Lactobacillus sp., and Clostridium sp.

Detailed explanation-4: -The flora of the large bowel is dense (109 to 1011/g of contents) and is composed predominantly of anaerobes. These organisms participate in bile acid conversion and in vitamin K and ammonia production in the large bowel. They can also cause intestinal abscesses and peritonitis.