Seventy percent of the immune system is located in the gastrointestinal (GI) tract, and the microflora (the bacterial population) of the GI tract constitute a complex ecosystem that can be viewed as an organ of the body.
Seventy percent of the immune system is located in the gastrointestinal (GI) tract, and the microflora (the bacterial population) of the GI tract constitute a complex ecosystem that can be viewed as an organ of the body.