Bacteria, including actinomycetes; viruses, and fungi.

Bacteria, fungi and microscopic algae.

Microflora are the plants and algae that cannot be seen with the naked eye.

The bacterial colonies found in the large intestine. These bacteria are important for proper digestion and fecal excretion of waste products.

The colonies of bacteria found in the large intestine. They are important for proper digestion and getting rid of waste products.

The normal population of microorganisms in a healthy organism.