There are three general reasons for establishing buffer zones: to provide sanctuary, to provide a neutral area that allows for supervision where contending claims exist (in order to, potentially, facilitate cooperation), and to simply reduce tensions through separation of disputants.
Iron and immunity are closely linked: firstly by the fact that many of the genes/proteins involved in iron homoeostasis play a vital role in controlling iron fluxes such that bacteria are prevented from utilising iron for growth; secondly, cells of the innate immune system, monocytes, macrophages, microglia and lymphocytes, are able to combat bacterial insults by carefully controlling their iron fluxes, which are mediated by hepcidin and ferroportin.
Iron and Zinc. A chicken liver provides a healthy dose of iron and zinc. Iron enables your body to use oxygen efficiently and to make new red blood cells. This mineral also plays a role in cell division and the health of your immune system. An iron deficiency can cause fatigue, decreased oxygen and a weakened immune system.