Izinto eziyinxalenye yeNkqubo yoKhuselo loMzimba
Inkqubo yokuzikhusela yomzimba, eyaziwa ngcono ngokuba yinkqubo yokuzikhusela, yinethiwekhi entsonkothileyo yeeseli, izicubu, kunye namalungu asebenzisanayo ukukhusela umzimba ekuhlaselweni ziintsholongwane ezibangela izifo ezifana neebhaktheriya, iintsholongwane, iifungi, kunye neeparasite. Le nkqubo ibalulekile ekusindeni komntu, njengoko ngaphandle kokuzikhusela okusebenzayo, umzimba unokuba lixhoba losulelo oluqhubekayo kunye nezifo ezahlukeneyo. Eli nqaku liza kuxoxa ngokweenkcukacha ngezinto ezenza inkqubo yethu yokuzikhusela.
1. Izithintelo Zomzimba Nezekhemikhali
Ukuzikhusela komzimba kuqala ngothotho lwemiqobo yomzimba neyekhemikhali ethintela iintsholongwane ukuba zingangeni emzimbeni.
– Ulusu: Ulusu lungumqobo wokuqala womzimba nxamnye neentsholongwane. Ulwakhiwo lwalo oluneeleya kunye nokuveliswa kwamadlala eoyile aqulethe ii-fatty acids kusebenza njenge-antiseptic yendalo. Ngaphezu koko, ulusu luneeleya ze-keratin ezinzima ukuba iintsholongwane zingene kuzo.
– Iinwebu zeMucous: Iindlela zokuphefumla, zokugaya ukutya, kunye neze-urogenital zigcwele iinwebu zemucous ezine-mucus. Le mucus ibamba iintsholongwane kwaye izithintele ukuba zingangeni emzimbeni.
– Iimveliso zeekhemikhali: Umzimba uvelisa iikhemikhali ezahlukeneyo ezineempawu zokulwa neentsholongwane kunye neentsholongwane. Umzekelo, ijusi yesisu ine-asidi eninzi (i-pH ejikeleze i-2), ekwaziyo ukubulala iintsholongwane ezininzi ezityiwa kukutya.
2. Ukuzikhusela Kwindalo
Ukuba intsholongwane iyakwazi ukudlula kwimiqobo yomzimba neyeekhemikhali, inkqubo yomzimba yokuzikhusela (engacwangciswanga) ikulungele ukusebenza.
– Iiseli zegazi ezimhlophe (iiLeukocytes): Ezi seli ziquka ii-neutrophils kunye nee-macrophages. Ii-neutrophils zihlala ziqala ukuphendula kusulelo kwaye zinokugquma iintsholongwane (ii-phagocytose). Ii-macrophages zenza i-phagocytosis kwaye zikhuphe imiqondiso yeekhemikhali eqokelela iiseli ezininzi zomzimba kwindawo yosulelo.
– Iiseli zeNatural Killer (NK): Ezi seli zinokubona kwaye zitshabalalise iiseli zomzimba eziye zosulelwa ziintsholongwane, ingakumbi iintsholongwane, kunye neeseli zomhlaza.
– Iiproteni ezincedisayo: Ezi liqela leeproteni ezijikeleza egazini kwaye zinokukhuthaza ukufa kweentsholongwane. Zisebenza ngokubhoboza ii-membrane zeeseli zezifo, nto leyo ebangela i-lysis.
– Ukudumba: Impendulo yokudumba ibonakala ngokuba bomvu, ukudumba, ubushushu, kunye nentlungu. Le yindlela yomzimba yokubonisa usulelo uze emva koko ukhawulezise inkqubo yokuphiliswa ngokwandisa ukuhamba kwegazi ukuya kwindawo echaphazelekayo.
3. Inkqubo Yokuzikhusela Ekwaziyo Ukuzikhusela
Xa inkqubo yokuzikhusela yomzimba inganelanga ukujongana ne-pathogen, inkqubo yokuzikhusela yomzimba eguquguqukayo okanye ethile, ethatha ixesha elifutshane ukuphendula, ithatha umsebenzi.
– Ii-Lymphocytes: Ziqulathe ii-B cells kunye nee-T cells, nganye kuzo inendima ethile kwimpendulo yomzimba eguquguqukayo. Ii-B cells zinoxanduva lokuvelisa ii-antibodies ezinokubona ii-antigens ezithile kwiintsholongwane. Ii-T cells zahlulwe zibe ziintlobo ezahlukeneyo: ii-helper T cells (CD4+) ezilungelelanisa impendulo yomzimba, kunye nee-cytotoxic T cells (CD8+) ezinokubulala iiseli zomzimba ezineentsholongwane.
– Ii-antibodies: Eziveliswa zii-B cells, ii-antibodies zibopha kwii-antigens ezithile kwiintsholongwane ukuze ziphawulwe kwaye zitshatyalaliswe zezinye iindawo zenkqubo yomzimba yokuzikhusela. Ii-antibodies zinokuphelisa ngokuthe ngqo iityhefu kunye neentsholongwane.
– Inkumbulo Yokuzikhusela Kwizifo: Enye yezona zinto zibalulekileyo kwinkqubo yokuzikhusela yomzimba ekwaziyo ukuziqhelanisa nokukwazi kwayo “ukukhumbula” iintsholongwane eziye zahlasela umzimba ngaphambili. Oku kwenza impendulo kwiintsholongwane ezilandelayo ikhawuleze kwaye isebenze ngakumbi. Ukugonywa kusebenzisa lo mgaqo ukubonelela ngokhuseleko kwizifo ngaphandle kokubangela ukugula.
4. Amalungu kunye neZicwiliso zeNkqubo yoMzimba
Amalungu kunye nezicubu ezahlukeneyo zinendima ebalulekileyo ekwakhiweni nasekusebenzeni kwenkqubo yokuzikhusela komzimba.
– I-Thymus gland: Indawo yokuvuthwa kweeseli ze-T. Le gland iqalisa ukuguquka kancinci kancinci kwaye ayisebenzi kangako xa ikhula.
– I-Bone Marrow: Indawo apho zonke iiseli zegazi zenziwa khona, kuquka neeseli ezibalulekileyo kwinkqubo yomzimba yokuzikhusela.
– I-spleen: Isebenza ukucoca igazi, iphinda isebenzise iiseli ezibomvu zegazi ezindala, kwaye idlala indima kwimpendulo yomzimba ngokwenziwa nokusebenza kwee-lymphocytes.
– Ii-Lymph Nodes: Zisebenza njengezihluzi zokuqokelela iintsholongwane kulwelo lwe-lymphatic kwaye ziindawo ezisebenzayo kwiiseli ze-B kunye neeseli ze-T.
5. Iindlela zoLawulo kunye noKunyamezela
Ukulawulwa kwenkqubo yomzimba yokuzikhusela komzimba kubalulekile ukuqinisekisa ukuba ukhuselo lomzimba lusebenza kakuhle ngaphandle kokuhlasela izicubu zomzimba, nto leyo enokubangela iingxaki zokuzikhusela komzimba.
– Iiseli ze-T eziLawulayo: Zidlala indima ekugcineni ukunyamezelana komzimba, zithintela iimpendulo zomzimba ezigqithisileyo okanye ezingeyomfuneko kwii-antigens zomzimba.
– Ukunyamezelana kwe-Antigenic: Inkqubo yomzimba yokuzikhusela iqeqeshwe ukuba ikwazi ukubona nokunyamezela ii-antigens zomzimba ngexesha lophuhliso nokuvuthwa kweeseli zomzimba, ukuthintela izifo zokuzikhusela komzimba.
Ukuqukumbela
Inkqubo yomzimba yokuzikhusela yinethiwekhi entsonkothileyo eneendlela ezininzi zokuzikhusela, ukusuka kwimiqobo yomzimba neyekhemikhali ukuya kwiimpendulo ezithile ezilungelelanayo. Ukuqonda izinto zayo ezahlukeneyo kunye nendlela ezisebenzisana ngayo kubalulekile ekuphuhliseni unyango lwezonyango, amachiza, kunye namaqhinga okuthintela izifo. Ngokuhambela phambili nophuhliso lwesayensi, kunethemba lokuba singaphumelela ngakumbi ekulawuleni nasekulawuleni inkqubo yomzimba yokuzikhusela ukuze kuzuze impilo yoluntu.
