The human intestines are filled with what is known as gut flora. Gut flora is microbia found in the digestive tract that consists of Bacteroides, Clostridium, Fusobacterium, Eubacterium, Ruminococcus, Peptococcus, Peptostreptococcus, and Bifidobacterium.
It helps you digest your food
Intestinal gut bacteria use humans as a host while also supplying them with valuable nutrients in return. By feasting on digested foods across the tract these bacteria can release life essential nutrients such as Vitamins B and K. By definition it is a symbiotic relationship between humans and our gut flora.
An anaerobic organism or anaerobe is any organism that does not require oxygen for growth. Examples are gut flora, skin flora, and bacterial disease.
Unicorns and nyan cats break up your food in your guts
This was off of Google,It creates an imbalance of the gut flora, causing stomach upset.
Micro-flora or microbiotas benefit humans by using up most nutrients before the bad microflora does. By doing this the bad micro-flora cannot grow out of control and causing damage.
Non human flora and fauna refers to all other living things (besides humans)
A general term for the "gut", which in humans includes everything from the stomach to the anus.
Human (normal) gut flora are bacterium largely beneficial to our health and nutrition. These flora are regarded to produce Vitamins B & K. Normal flora also play an important role from birth in the human immune system.
There are maybe 500 species of microbes in the gut. You can live without them but they perform many helpful functions: making Vitamin K, help your immune system, keeping disease causing bacteria in-check, plus more.
Only certain birds have the gut flora necessary to eat grass. This include domestic birds such as ostriches, ducks, and geese.