Ukulandelela ukuhamba kwegazi entliziyweni akulula njengokubonakalayo. Inhliziyo iyilungu eliyinkimbinkimbi, isebenzisa amakamelo amane, iinevve ezine , kunye nemithambo yegazi ezininzi ukubonelela ngegazi emzimbeni. Ukugqithisa entliziyweni kuyinkimbinkimbi, kunye negazi elihamba entliziyweni, ngoko imiphunga, ngaphambi kokubuyela kwakhona entliziyweni.
Igazi libuyela entliziyweni ukusuka emzimbeni ngeemitha ezimbini zegazi ezibizwa ngokuba yi-vena cava ephezulu kunye ne-inferior vena cava.
Eli gazi lithwala i-oksijeni encinci, njengoko libuya emzimbeni apho i-oksijeni isetyenziswa khona.
Igazi lokuqala lingena kwi-atrium efanelekileyo. Emva koko uhamba nge-valve ye-tricuspid ukuya kwi-ventricle efanelekileyo. Xa intliziyo ishaya, i-ventricle igxotha igazi nge-valve ye-pulmonic kwi-pulmonic artery. Lo mzobo uhlukile: Nguye kuphela umthambo womzimba womntu ophethe igazi elingenayo i-oxygen.
Umthambo we-pulmonic uphethe igazi emiphakeni apho "ithatha" i-oksijeni, kwaye ishiya imiphunga iphinde ibuyele entliziyweni nge-pulmonic vein. Igazi lingena kwi-atrium ekhohlo, uze uhla nge- valve mitral kwi-ventricle ekhohlo. I-ventricle engasekhohlo iqhube igazi nge-valve ye-aortic, kunye ne-aorta, umkhumbi wegazi okhokelela kuwo wonke umzimba.
Kunzima, akunjalo?
Oku kunokwenza kube lula: Ngaphandle kwezivini, iifenricles zentliziyo ayikwazi ukuvelisa nayiphi na amandla okanye uxinzelelo.
Kuya kufana nokupompa isondo elincinci elinomngxuma omkhulu kuyo. Unokupompa konke ofuna, kodwa ivili ayinakuze lithinte. Kwimeko yentliziyo, igazi liza kungena egumbini, kwaye liza kungena kwikamelo kunye ne-valve ephantsi, okanye phezulu ukuya kwicala elingalunganga ngexesha ngalinye i-ventricle yazama ukupompa igazi.
Endaweni yoko, i-valve ephezulu kwiphepha ngalinye livula ukuvumela ukuba lizalise, ngelixa i-valve engezantsi yenza ukuba igazi lingaphumeleli. Xa i-ventricle igcwele, i-valve ephezulu ivala kwaye i-valve ephantsi ivula. I-ventricle igxininisa igazi ngaphandle ngamandla kwi-valve engezantsi. Okubalulekileyo, iiplavines zigcina igazi ligeleza kwisalathiso esifanelekileyo ngentliziyo.
Shwa nkathela:
Igazi lishiya intliziyo kwaye liya kumathishini omzimba ukubonelela nge-oxygen kwaye yenze enye imisebenzi egcina ubomi. Igazi libuyela kwintliziyo. Okokuqala, igazi ligeleza kwi-atrium elungileyo, lidlula kwi-valve ye-tricuspid, kwaye yenza indlela yalo kwi-ventricle efanelekileyo. Emva koko uhamba nge-valve ye-pulmonic, kwi-pulmonary umthambo kwimiphunga. Emva kokucoca i-oksijini emiphakeni, igazi liphuma emiphakeni lingena emthanjeni wepulmonary, kwi-atrium ekhohlo, kwi-valve ye-mitral, kunye ne-ventricle enamandla ekhohlo ephosa igazi kumzimba nge-valve ye-aortic. Xa igazi liphuma entliziyweni yise-aorta apho iphuma khona kwiindawo ezahlukahlukeneyo zomzimba.
Imithombo:
> Isiseko seAnatomy kunye neMisebenzi yeNtliziyo. YourHeartValve.com/Edwards Lifesciences. http://www.yourheartvalve.com/heartbasics/Pages/heartanatomy.aspx
> Inhliziyo yeAnatomy. I-Texas Heart Institute eSibhedlela saseSt. Luke's Episcopal. http://www.texasheart.org/HIC/Anatomy/anatomy2.cfm