All body tissues are sterile except those that?
Most of the body tissues are sterile (Blood, Brain, Kidneys etc..) except organs gets frequent exposure with microbial Flora
* Skin - Our skin has Gram positive Bacteria, microbes which usually do not cause any diseases
* External Respiratory Tract : microorganisms can enter oropharynx and contaminate the tissues
* Mouth : Saliva creates favourable environment for microbes
* Small intestine always colonised by anaerobes
* Genitourinary Tract: Presence of avirulent microbes and vaginal microorganisms contaminate the surroundings.
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