Kwegazi

Inkqubo naliphi na iqumrhu isilwanyana iquka amalungu eqela yokujikeleza, aqukiweyo kule nokuhamba kwegazi. Ngenxa yokuba umsebenzi wayo eqhelekileyo ikhutshelwa imali lasekunene oksijini kunye nezondlo, iihomoni kunye neetyuwa kunye nezinye izinto ezibalulekileyo. Ukongeza, inkqubo kwegazi ezisebenza umsebenzi yesibini. Kuthatha iiseli nokutshintshiselana inkunkuma ithatha kuzo zonke iinxalenye yabumba umzimba kuyo carbon dioxide. Uthungelwano entsonkothileyo apho kuyimfuneko ukuze isikolo sisebenze kakuhle izinto eziphilayo kusiwa kuzo zonke kwinkqubo yayo, wabumba ezityeni, intliziyo kunye negazi ngokwayo.

ukusebenza System, babanikela onke amalungu izondlo, ngokusekelwe umsebenzi izihlunu engabalulekanga. Oko kukuthi, enza umsebenzi kwimpompo, yetha igazi ngesantya esiphezulu. Ixabiso le ubungakanani ilingana eemitha elinanye ngomzuzwana. Xa izishunqulelo kwemisipha intliziyo uxinzelelo fluid kwenzeka, oko kuthiwa ngokugqithisileyo. Kuyinto phezulu emoyeni. uxinzelelo kakhulu kwi yezonyango kuthiwa igazi. nesilinganiso yawo iqala neqela zero ixabiso elilinganayo ubukhulu ukuya womoya. Kwisithuba somzuzu omnye umsebenzi owenziwe ngexesha imeko quiescent umzimba, intliziyo iimpompo nge ngokwayo kakhulu 3.6 iilitha igazi ukuze igcine ombane lwangaphakathi zaveliswa. uxinzelelo lwegazi kuthatha ixabiso layo eliphezulu ngexesha ikhowudi lunciphiso (systole). Xa kuthanjiswa engabalulekanga (diastole), lo ombane lwangaphakathi kusithwa kiswano.

Inkqubo yegazi yomsebenzi womnatha wayo adlulisele kuye ukuhamba kwegazi. Udlula ezityeni, usazisa ulwelo kokuba ukuxinana 1.06 grams nganye sentimitha cc. Blood budget lihambe nkqubo, kubandakanywa kwemithambo ngemithambo enkulu. Ezi isebe iimpahla ukunciphisa ngokuphindaphindiweyo yaye ngokuthe ngcembe ngobukhulu ukuya ngcanjana zincinane. Ukuhamba kwegazi lisiya kwi kwisantya apho unikwa isingqisho yintliziyo. Kwi ukuhamba engamanzi naye ephembelela enixabana lwangaphakathi kunye sayo isitya ubukhulu. Imithambo zidlulela kumfula igazi iisentimitha amahlanu ngomzuzwana. Ngemithambo ukubaluleka kwalo ezimashumi mabini cm / s. Ezi emithanjeni zezona ngesantya kakhulu eliphantsi ngenxa ubudeki yabo. Kuyinto omise ngaphantsi kwe ezimbini ngesekondi. Xa oku pulses xi zicinezelwa ngo emithanjeni.

Umthamo we inkqubo yokujikeleza likhulu kunokuba imali igazi emzimbeni. Igcwele omnye kuphela amane amawaka. Kule kukho isizathu. Ukuba kuvela iimeko ezifuna ngakumbi kwegazi liya amalungu, isuke kwicala elifanelekileyo.

Anatomy of intliziyo kwimikhumbi igazi ivumela rhoqo ezinqumla igazi lika nxantathu, equka emiphungeni, izihlunu, myocardium nesibindi. Kulo mzekelo, i kuyimfuneko izondlo edlula kwemithambo kunye emithanjeni, nokufumana zonke iseli omzimba womntu, igalelo kwindlela eqhelekileyo yokusebenza komzimba. Xa uyila umsipha ezesifuba ngezimanga nemithambo zophendlo lwezifo kwenzeka izifo kwegazi. Ezi zifo ziquka:

- samathambo oyingozi uhlobo;

- isifo kobuchopho kwemisipha intliziyo;

- izifo leyo zihamba ukwanda koxinzelelo lwegazi;

- isifo sentliziyo rheumatism ezingapheliyo;

- ephula kwegazi pulmonary begazi;

- isifo cerebrovascular;

- isifo ezi ngcanjana yegazi;

- izifo emithanjeni, neempahla emithanjeni neendawo;

- ezinye imikhumbi kunye nesifo sentliziyo.

inkqubo yokujikeleza, kwakunye nempilo yakhe elibukhali kwezonyango. Isizathu soku ke data kwabathile lweenkcukacha wabeka intliziyo kunye nesifo semithambo kwindawo yokuqala ehlabathini ngokwemiqathango yokufa.