Kwegazi e abantu

izitho kwegazi emzimbeni womuntu uvumele igazi ukwenza yonke imisebenzi edingekayo. Ingqikithi yalo kwegazi kuyinto ukuhamba kwegazi ngokusebenzisa izitsha ukunikeza izakhi kudingeka kubo bonke imizimba yabantu. Zonke izitho kwegazi Uhlelo yakhiwa imithambo yegazi kanye inhliziyo. Ngokunciphisa imisipha yenhliziyo, igazi zisakazekela izitsha. Kunezinhlobo ezimbili zezinhlobo zemikhumbi: imithambo (athwala igazi lisuka imisipha yenhliziyo kuya kwezitho nezicubu) kanye emithanjeni letiphakela igazi enhliziyweni. Phakathi kwazo zonke izitsha axhunyiwe kulencane igazi liphuma kuma-capillary.
Kubantu, kukhona okulandelayo kwegazi: ezincane, ezinkulu. Isiqu sawo noma embuthanweni omkhulu, zivela e-ventricle engakwesobunxele senhliziyo. Igazi ageleza ke ku umfula oyinhloko emzimbeni womuntu - elikuyi-aorta. Kusukela igazi yomthambo i-aorta zibhebhetheka eduze emgogodleni ngemithambo yegazi ezincane. Ngemva kokufinyelela izitho, imithambo, arteriole zihlukaniswe izitsha ngaphezulu igazi elincane, nakho kuthiwa selihlukene laba capillary. Njengoba kwezitho nezicubu babe te nge mpilo nezakhi ezidingekayo ukuze kwendikimba evamile. Ngokufanayo, kuthatha isikhathi ukuqala capillary, igazi emithambo yegazi ungena emithanjeni ezimbili ezinkulu emzimbeni, ephansi kanye engenhla. It is ke uthunyelwe ATRIUM kwesokudla. lonke Lo mjikelezo iyona kwegazi.
Yamaphaphu, noma ezinye indilinga lencane kwegazi owenza indlela emfushane. Kusukela i-ventricle yangakwesokudla senhliziyo eshiya Umthambo ezinkulu, okuyinto ihlukaniswe imithambo yamaphaphu ezimbili. Ngakho igazi ahlanganiswe-mpilo ilethwa emaphashini. imithambo Major zihlukaniswe arteriole, futhi lokhu kuyithuba zihlukaniswe capillary. Lokho bavumela ukukhanya bazogcwalisa zihlangana nomoya-mpilo sisusiwe -carbon dioxide. Ngakho kukhona exchange yamagesi e yamaphaphu. Khona-ke igazi emithambo yegazi ageleza ngemithambo kuya ATRIUM kwesokunxele.
Ezincane nezinkulu kwegazi imisebenzi efana kuzo zonke izitho. Imithambo athwala igazi, ecebile nomsoco kanye oxygen kwezitho nezicubu. Vienna, esikhundleni salokho, ebuyisela igazi emithambo yegazi ukuze inhliziyo. Ezahlukene kuphela ibanga: lokukhulu nalokuncane. Imibuthano kwegazi usebenze-mpilo saturation umsebenzi emangqamuzaneni omzimba.
Kodwa kwegazi baphathe akubona bonke egazini emzimbeni. Inani elithile igazi wasigcina edepho igazi. Atholakala ubende, isibindi, emaphashini futhi imithambo yegazi ngaphansi kwesikhumba cluster. Lezi emadepho ezidingekayo ukuze eziphuthumayo saturation umoya-mpilo ezicutshini eziyishumi nemitshingo.
ukusatshalaliswa igazi phakathi kwezitho ngabanye komzimba akuyona iyunifomu. Ukusakazwa kokunikeza igazi, kuye ngokuthi isitho noma izicubu umsebenzi. Lokhu kungenxa esikhuthaza ukwanda ukuvaleka imithambo. Igazi ngenkuthalo umzimba usebenza ihlinzekwa imali enkulu ngenxa ukuncishiswa ukugeleza kwegazi kwezinye, izitho kancane esebenzayo.
umsebenzi Ukusakazwa ngokusebenzisa isimiso imithambo yegazi, futhi yebo, imisipha yenhliziyo. Ukuze ziyiswe kwezitho nezicubu umoya-mpilo ahlanganiswe igazi nezakhi kukhona Umthambo wemfanelo. Siyabonga kubo, kusekelwa umfutho ophakeme enikeza intuthuko okusheshayo igazi liphuma kuma-capillary kanye saturation kwezicubu eziyishumi nemitshingo.

Igazi edabula yokujikeleza kwegazi eliya emaphashini yakhiwa umuntu imikhiqizo msebenzi obalulekile ne-carbon dioxide. imithambo yegazi okunjalo zidluliselwa, abizwa ngokuthi emithanjeni.
Capillary futhi ukudlala indima ebalulekile wonke isimiso sokujikeleza kwegazi. Lena Inethiwekhi ebanzi izitsha ezincane igazi, lapho elihlale nomsoco kanye igazi nomoya-mpilo ilethwa ngqo kwemisipha izicubu kanye izitho.
Yonke isimiso sokujikeleza kwegazi ibaluleke kakhulu empilweni umzimba. Inhliziyo, imithambo yegazi kanye kwegazi - kuyinto izingxenye zalo eziyinhloko.