19,916
edits
Changes
→The Eyes
: The eyelids sweep [[micro-organism]]s from the surface of the [[eye]]s.
: The eyelashes prevent some [[micro-organism]]s getting into the [[eye]]s.
: The [[Tear Duct|tear duct]]s ducts produce [[Lysosome]]s which are [[antimicrobial]] [[chemical]]s.
===The Stomach===
: The [[stomach]] is kept at a very low [[pH]] with [[Hydrochloric Acid]] which kills most [[micro-organism]] which enter the [[stomach]].