EVERYDAY SCIENCE

Detailed explanation-1: -First, the number of bacteria in your gut is vast – 50 trillion or so, which equals about one for every human cell in our bodies. The makeup of this bacterial collection, or microbiome, is affected by many things, including diet, exercise and cultural influences.

Detailed explanation-2: -The kinds of bacteria in our gastrointestinal tract fall into five main phyla: Bacteroidetes, Firmicutes, Actinobacteria, Proteobacteria and Verrucomicrobia. Of these, Bacteroidetes and Firmicutes are usually the most common.

Detailed explanation-3: -Your large intestine is home to trillions of bacteria. Bacteria in the large intestine have important roles, such as producing vitamins and controlling the growth of harmful bacteria.

Detailed explanation-4: -The researchers calculated the number of bacteria in the large intestine to be 3.9x1013. All other organs of the human body contain at most another 1012 bacteria. This means that in total, some 3.9x1013 (39 trillion) bacteria frolic in and on the human body – which is far fewer than previously thought.