How Our Bodies Protect Us From The Internal And External Environments

1266 Words6 Pages
This journal article was over how our bodies protect us from the internal and external environments. The host has three main “fences” that help with that protection, the skin, the gastrointestinal tract, and the respiratory tract. We are really interesting subjects, the internal and external surfaces of our bodies are constantly being introduced to new bacteria, microbes, and pathogens and yet we do not get sick. The barriers or fences protect us and are crucial for our immune response. There is still much not understood about the immune system but we do know with certainty that when a child is born he or she acquires around two thousand different species of bacteria that really help to get the child immune system started and running. The researchers also know that there is four dominate groups of bacteria phyla’s in the “intestinal niche”, Firmicutes, bacteroidetes, Actinobacteria, and proteobacteria. We are able to have our normal bacteria’s in and on us because our immune system has learned to co-exist with its symbiotic species. As one may wonder or even certainly expect, competition does occur between the host symbiotic organisms and potentially harmful bacterial cells. They compete mainly for nutrients but also for space, some microbes even engage in “chemical warfare” and possibly even killing its rivalry. Inflammatory disorders can possibly arise from the internal and superficial wars going on, that is why the immune system is constantly being monitored for comprises
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