Ukuhambisa umzimba ngegazi, oksijini, nezakhi
Imishanguzo imithwalo yegazi ethwala igazi kude nenhliziyo kuwo wonke umzimba. Zifakwe njengezilimo eziyizigaxa kanye negatsha zibe yi- arterioles ukuze kufinyelele ezithombeni nasezicukeni. I-contraction ye-contraction yenhliziyo iqhubekisela phambili igazi nge-arteries.
Imishanguzo ekujikelezeni okuhlelekile
Umthamo omkhulu we-circulation systemic yi-aorta. Ihlanganiswe ne-ventricle yesokunxele yenhliziyo futhi ithwala igazi elenziwe nge-oxygen.
Amagatsha ase-aorta abe yi-arterium eya ezingxenyeni ezihlukene nezingxenye zomzimba. Ungase uzizwe ukushisa kwakho emthonjeni onjengomshini we-carotid entanyeni noma umshini omsakazo esihlakaleni.
Umthambo we-pulmonary uhlukile kwabanye ngoba unamathele entoyeni ye-ventricle efanele futhi ithwala igazi elingenampofu emoyeni emaphashini. Lapha, lifaka ama-arterioles nama-capillari ukuze igazi lingathatha oksijini ngaphambi kokuba libuyele enhliziyweni nge-vein pulmonary. Leli gesi le-oksijeni lingena e-atrium lesokunxele futhi liqhutshelwa ku-ventricle langakwesokunxele futhi liphume nge-aorta.
Ukwakhiwa kwemithambo
Imishanguzo iqukethe amaphesenti aphezulu ohlobo oluthile lwesisipha, okuthiwa i- muscle ehamba phambili , engalawulwa ama-hormone nezibonakaliso ezikhethekile kusuka ohlelweni lwezinzwa. Ingqimba yangaphandle yomthambo yenziwe ngamakhodi e-collagen. Isendlalelo esiphakathi sinemisipha ephathekayo neyezintambo. Ingqimba yangaphakathi yimbeni ebizwa ngokuthi i-endothelium.
Igazi lihamba phakathi kwesizinda esingenalutho se-arteries. Uma lesi sikhungo esingenalutho sigxilile ngenxa yokuthuthukiswa komzimba noma ukubunjwa kwamapulangwe, kungakhuphula ukucindezelwa kwegazi. I-Plaque yenza futhi ukuthi imishanguzo ingabi nezimo ezincane. Uma i-artery iphuka noma ivinjelwe, njengesihlungu noma isifo senhliziyo, izicubu ezivame ukuzitholela zizofa.
Izindonga ezinamandla, ezinamandla ze-arteries zenza bakwazi ukulwa nezingcindezi eziphezulu ezikhona eduze kwenhliziyo. Zonke izitho ezinkulu ezisemzimbeni zinemizimba yazo ekhethekileyo yemithi ehlelwe ngokukhethekile ukuletha izinto ezidingekayo.
Imisipha yenhliziyo inikezwa yi- coronary arteries . Umthambo we-coronary wesokunxele kanye ne-artery coronary efanele ephuma e-aorta nangomshini we-coronary wesobunxele uphinde uhlukanise phakathi kwe-artery circumflex kanye ne-left aniorior descending artery. Le mibhobho emine yiyo engase ithathwe esikhundleni se-coronary artery bypass graft (CABG) ukuhlinzwa. I-overpass encane ithatha indawo yonke imishanguzo emine.
Impilo ye-Arterial
Ukuqeda imithwalo yegazi kuyisikhathi esivamile sokuphefumula kwe-atherosclerosis kanye ne-peripheral arterial disease (PAD). Lokhu kwenzeka lapho amafomu e-plaque avela kumafutha, i-cholesterol, i-calcium, amaprotheni, namaseli avuthayo, ukunciphisa noma ukuvimbela imishanguzo. Uma lokhu kwenzeka emithanjeni yenhliziyo, yisifo se-coronary artery (CAD).
Izingozi ze-PAD zibandakanya ukubhema, isifo sikashukela, ukucindezeleka kwegazi kanye ne-cholesterol ephezulu. I-PAD ingaholela ekuhlaselweni kwenhliziyo, ukushaywa isifo, ukuhlasela kwesaschemic okudlulayo, isifo somswakama we-renal nokukhishwa.
> Imithombo
> Izinhliziyo Nezikhumba Zegazi: Ama-coronary Arteries akho. Umtholampilo waseCleveland.
> Ihlelo Lokujikeleza Kwegazi Lisebenza Kanjani? Ilabhulali Kazwelonke Yezokwelapha yase-US.
> I-Arterial Artery Disease (PAD). Umtholampilo waseCleveland.