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LIMFA

limfaLIMFA (az lot. Lympha – obi toza, nami), moei berangi shaffof, ki tarkibash ba plazmai khun monand buda, az on bo kamii safedaho farq mekunad. Reaksiyai L. ishqorist (Rn 7,35 – 9,0), zichiash 1,017 – 1,026.
L. hujayrai boftahoro bo gizo tamin karda, mahsuli mubodilai moddahoro khorij menamoyad. Paydoishi L. bo moei boftaho robitai mustahkam dorad. Moei boftaho dar natijai az khun ba boftaho muttasil guzashtani oksigen va moddahoi gizoi hosil megardad.Az tarafi digar, ba moei boftaho az hujayraho dar natijai mubodilai moddaho mahsule judo meshavad, ki yak qismi on ba khun barmegardad, qismi digar yakjoya bo moe ba muraghoi limfavi dokhil shuda, L. hosil mekunad.
Surati jarayoni L. dar ragho sust ast (taqr. 300 mm/daq.). Dar odam va jonvaroni muhradori olitashakkul harakati L. ba tafovuti fishor dar muraghoi limfavi (az fishori atmosferi ziyod ast) va majroi limfaguzar (az fishori atmosferi past ast), hamchunin ba kashishi mushakhoi skelet (ba raghoi limfavi taziq meorand) va harakati devorai khudi ragho vobasta ast. Klapanhoe, ki dar raghoi limfavi vujud dorand, ba harakati baraksi on mone meshavand.
Tarkibu khususiyati L. az moei boftaho va plazmai khun (miqdori kami safeda, vazni khosi khurd, darajai pasti chaspaki va g.) farq mekunad. Takhmin meravad, ki badani odam 1 – 2 l limfa dorad. L. bo muragho, ragho va shokhahoi limfavi harakat karda, ba khuni siyohrag (vena) hamroh meshavad.
Hudi limfa az moe (plazmai limfavi) va unsurho iborat ast. Dar tarkibi plazmai limfavi safedaho, glyukoza, moddahoi limfavi, ravgan vujud dorand. Ba unsurhoi tarkibi L. limfositho, monositho va baze navhoi digari leykositho mansuband. Hangomi purzur gashtani kori har kadom uzv dar on limfa beshtar paydo meshavad. Gayr az in, miqdoru tarkibi khimiyavii limfa, az jumla foizi ravganu safedai on, ba khususiyati mubodilai moddaho va faoliyati uzv vobasta ast. Mas., badi istemoli taomi serravgan, binobar dar raghoi limfavii ruda afzudani ravgan rangi L. safed meshavad. L.-e, ki az gadudhoi tarashshuhi dokhili jori megardad, miqdori muyyani gormonhoro dorad. Miqdori ziyodi limfositho ba L. az uqdahoi limfavi meoyand. L. tavvasuti uqdahoi limfavi borho sof va az bakteriyayu zarrahoi halnoshuda, hamchunin moddahoi zararovare, ki az boftaho ba on meguzarad, ozod megardad.

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