Uhlelo lokujikeleza, olwaziwa nangokuthi uhlelo lwe-cardiovascular, luyinto elula eqala, futhi iphela, ngenhliziyo yakho. Yisistimu evaliwe, okusho ukuthi igazi alifaki noma lishiye uhlelo ngenkathi uhambo lwayo kusuka enhliziyweni yakho ukuya emzimbeni wakho futhi buyela emuva. Esimisweni esinjalo, ukugeleza okuqhubekayo ketshezi elifanayo kungagxilwa nge-loop kaningi.
Igazi lisakazwa emzimbeni wakho nge-system yakho ye-arterial- arteries , arterioles, namapillari - futhi ubuyela enhliziyweni yakho nge-systemous venous-veins and venules. Igazi lakho libalulekile empilweni yakho futhi ludlulisa izakhi ezinjenge-electrolytes, i-oxygen, i-carbon dioxide nama-amino acids kuwo wonke umzimba wakho. Inhliziyo yakho ibangela iningi lomsebenzi wesistimu ye-circulatory futhi lapho inqubo iqala khona.
Ukujikeleza Kuqala Enhliziyweni Yakho
Uhlelo lokujikeleza luqala e-atrium yakho yangakwesokudla, ekamelweni eliphezulu langakwesokudla senhliziyo yakho. Njengoba igazi lihamba ngenhliziyo yakho, lidlula ngayinye emakamelweni amane (ngakwesokudla, phansi kwesokudla, ngakwesokunxele ngakwesokunxele, ephansi ngakwesobunxele), ithatha isisindo esisheshayo emaphashini ukuze ususe i-carbon dioxide futhi ithathe umoya-mpilo, bese iphetha ekamelweni elingaphansi kwesokunxele, elibizwa nge-ventricle kwesokunxele.
Uma kuziwa ekujikelezeni igazi emzimbeni wakho, i-ventricle yesokunxele yikamelo elibaluleke kakhulu enhliziyweni.
I-ventricle engakwesokunxele yiyona enkulu kunazo zonke emakamelweni amane futhi inesibopho sokwenza amandla okudingekayo ukuxosha igazi lakho e-aorta yakho, iseri sokuqala igazi lakho lingena lapho lishiya inhliziyo yakho.
Kusukela ku-Aorta yakho kuya kuma-Capillaries akho
Igazi lakho lihamba ukusuka e-aorta yakho ngokusebenzisa uchungechunge lwezingcingo zegazi ezincane uze lifinyelele kuma-capillaries akho.
Ngaphambi kokuba ufinyelele kuma-capillari akho, noma kunjalo, igazi kufanele lihambisane ne-arterioles, lapho ijubane layo nengcindezi ihlale iguqulwa njengezingxenye ezahlukene ze-arterioles shintsha ububanzi ngokuphendula kwengcindezi kanye nezinzwa zamakhemikhali ezibekwe eduze. Lezi zinzwa zilungisa ukugeleza kwegazi nge-arterioles ekuphenduleni izimo ezishintsha emzimbeni wakho.
Ngenxa yesenzo se-arteriole, ngesikhathi igazi lakho lifika kuma-capillaries akho, alisayihamba ngendlela yokudonsa. Igazi ligeleza ngokuqhubekayo ngokusebenzisa ama-capillaries, alisho "squirt" futhi "pause" njengoba inhliziyo yakho ibetha. Lokhu kugeleza okuqhubekayo kuyadingeka ngoba kunokushintshana okuqhubekayo kwe-oksijeni nezakhi ezitholakala ezindongeni ze-capillary. Ayikho iseli emzimbeni akude ne-capillary.
Buyela Enhliziyweni Yakho Futhi Konke Futhi
Njengoba igazi lihamba ngama-capillaries, ukunikezwa kwalo kwe-oxygen kuncishisiwe futhi sekuthole nemikhiqizo yokudoba. Kusukela kuma-capillary, igazi lingena emasongeni, emithanjeni, bese libuyela emuva enhliziyweni ukuze liqabuleke futhi lithunyelwe futhi.
Ekuphetheni, inhliziyo yakho isebenza njengepompo ehlinzeka izakhi kuzo zonke izitho, izicubu, neselula kuwo wonke umzimba wakho. Futhi, amaseli akho alahle imikhiqizo yemfucuza, njenge-carbon dioxide, ebuyela egazini lakho ukuze ibuyiselwe enhliziyweni yakho.