Question

Friendly bacteria live mostly in the large intestine and part of the small intestine, because what organ is too acidic?

Answer 1

stomach

Your large intestine is not just made up of cells. It is also an ecosystem , home to trillions of bacteria known as the "gut flora"   Figure below  . But don't worry, most of these bacteria are helpful. Friendly bacteria live mostly in the large intestine and part of the small intestine. The acidic environment of the stomach does not allow bacterial growth.