I-tricuspid and mitral valves
Iinqwelo zentsimbi kunye ne-mitral valve zibizwa ngokuba yi-atrioventricular, kuba zikhoyo phakathi kwe-atria kunye ne-ventricles kwicala elisekunene nelikhohlo lentliziyo. Ziqukethe izicubu ezixubileyo kwaye zihlanganiswe ne-endocardium - uluhlu oluncinci lubekwe ngaphakathi kwintliziyo. Umgangatho ophezulu wamagatya uyaqatha, kwaye ezantsi zikhona izixhobo ezixhumeneyo ezinokubambisa amaphecana. I-valve ye-tricus isineentsimbi ezintathu, kwaye i-mitral valve inamagatya amabili (ikwabizwa ngokuba yi-bivalve). I-mitral valve yafumana igama layo ngenxa yokufaniswa kwifomu kunye nomgca we-bishop.
I-valve yamathambo
I-valve ye-pulmary valve itholakala kwindawo yokuphuma ye-trum pulmonary ukusuka kwi-ventricle efanelekileyo. I-pulmonary trunk ithwala igazi ukusuka entliziyweni ukuya kumaphaphu. Ngaphaya kweepopu zephakheji yombane we-pulmonary amancinci amancinci azaliswe ngegazi kunye nokuthintela ukubambelela kweevavini eludongeni lwesikhala se-pulmonary xa ivalve ivuliwe. Ngethuba le-systole ye-atria, igazi liphuma nge-tricuspid and val valves evulekile kwii-ventricles. Ngexesha le-systole ye-ventricles, ukunyuka ngokukhawuleza kwengcinezelo kubangela ukuvalwa kwezivini ze-atrioventricular. Oku kuvimbela ukubuyela kwegazi kwi-atria. Iiguphu zeValve zigcinwe ngamaqhekeza, ezingavumeli ukuba zivule ngenxa yokunyanzeliswa kwi-ventricles. Emva kokuvalwa kwamavaji e-atrioventricular, igazi lihamba ngeemigodi ze-semilunar ukuya kwi-trunk pulmonary kunye ne-aorta. Iipilunar ze-Semilunar zivulekile ngenxa yomsindisi ophezulu kwi-ventricles kwaye ziwa ngokukhawuleza xa i-systole iphela kwaye i-diastole iqala.
Umsebenzi Wentliziyo
Ukusebenzisa i-phonendoscope, unokuva ukuba yonke intliziyo ihamba kunye nokubonakala kweentliziyo ezimbini. Ithoni yokuqala ibonakala ngexesha lokuvalwa kwezivini ze-atrioventricular, kwaye okwesibini - ngexesha lokuvala i-valve ye-pulmonary artery ye-valve ye-aortic. Iimvumba zihamba ukusuka emaphethelweni kunye nomgangatho ophantsi weevavini ze-tricuspid and mitral valves, kwaye ke zijoliswe ezantsi kwaye ziqhotyoshelwe kwiimisipha ezinamaphepha ezinokuthi ziqhube kwi-ventricular cavity.
Umgaqo wokusebenza kweengoma
Iikholam ziyakuthintela ukutshintshwa kwamagatya e-atrioventricular valve kwisigxina se-anary phantsi kwesenzo sexinzelelo legazi ngexesha le-ventricular systole. Ziqhotyoshelwe kwiiplavines ezikufutshane, eziqinisekisa ukuvalwa kwazo ngokugqithiseleyo ngexesha le-ventricular systole kunye nokuvimbela ukuhamba kwegazi kwakhona kwi-atrium. I-valve ye-aortic kunye ne-pulmary valve yamanzi i-valve nayo ibizwa ngokuba yi-semilunar. Zifumaneka endleleni yokuphuma egazini esuka entliziyweni kunye nokuthintela ukubuyela kwegazi kuma-ventricles ngexesha le-diastole. Ngalunye lwezi zivini zimbini ziqukumbela kwenyanga, zifana neepokotshi. Ziqukethe izicubu ezinxibelelwano kwaye zihlanganiswe ne-endothelium. I-Endothelium yenza iigufi ziphephe.