GENERAL HISTOLOGY

Detailed explanation-1: -Not all bacteria are harmful, and some bacteria that live in your body are helpful. For instance, Lactobacillus acidophilus-a harmless bacterium that resides in your intestines-helps you digest food, destroys some disease-causing organisms and provides nutrients.

Detailed explanation-2: -Bacteria are found almost everywhere on Earth and are vital to the planet’s ecosystems. Some species can live under extreme conditions of temperature and pressure. The human body is full of bacteria, and in fact is estimated to contain more bacterial cells than human cells.

Detailed explanation-3: -They are everywhere: in soil, rivers, plants, animals, tap water, on your keyboard, on your pillow and in your body. Some microorganisms live with us and inside our bodies. Bacteria represent the majority of the microorganisms living in the body.

Detailed explanation-4: -bacteria (singular: bacterium; adj. bacterial) Single-celled organisms. These dwell nearly everywhere on Earth, from the bottom of the sea to inside other living organisms (such as plants and animals).