write a HAIKU for immunology about barrier, so the Haiku should be about barrier.

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Biology

write a HAIKU for immunology about barrier, so the Haiku shouldbe about barrier.

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Immunological Barriers include the defense system our bodyemploys to protect from the pathogens which are encountered inevery minute Our bodys defense system may be divided into twocatagories called Innate Immune system and the second one isAdaptive Immune system Innate immune system is present in anindividual just from the birth including Physical and chemicalbarriers which forms the first line of defense for the body againstthe invading pathogens These include Skin Tears Saliva mucusStomach acid urine flow cilia inner lining of gastrointestinaltract and respiratory tract cilia friendly bacteria and somewhite blood cells called neutrophils Apart from these there arealso mechanical barriers as well like the waxy cuticle of mostleaves the exoskeleton of insects the shells and membranes ofexternally deposited eggs are examples of mechanical barriers thatare the first line of defense against infectionIn thelungs coughing and sneezing mechanically eject pathogens and otherirritants from the respiratory tract thus acting as a barrierChemical Barriers includeThe skin and respiratory tract secrete antimicrobial peptidessuch as the defensins Enzymes such as lysozyme and phospholipaseA2 in saliva tears and breast milk are alsoantibacterialsVaginal secretions serve as a chemical barrierfollowing menarche when they become slightly acidic while semencontains defensins and zinc to kill pathogens In the stomachgastric acid and proteases serve as powerful chemical defensesagainst ingested pathogensIn humans the bloodbrain barrier bloodcerebrospinal fluidbarrier and similar fluidbrain barriers See Answer

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