Ama-valve ama-tricuspid ne-mitral
Ama-valve ama-tricuspid ne-mitral abizwe ngokuthi i-atrioventricular, ngoba atholakale phakathi kwe-atria nama-ventricles engxenyeni yesokudla nengakwesokunxele yenhliziyo. Ziqukethe izicubu ezinamandla ezixhumene futhi zihlanganiswe ne-endocardium - ungqimba oluncane olufaka ubuso obuphakathi kwenhliziyo. Ubuso obuphezulu be-valve bubushelelezi, futhi ezingezansi kunezinhlayiya ezihlangene ezithinta ukufaka amapheshana. I-valve ye-tricuspid inezigaxa ezintathu, futhi i-valve mitral inamagagasi amabili (ibizwa ngokuthi yi-bivalve). I-valve ye-mitral yabizwa negama layo ngenxa yokufanisana ngesimo ne-miter ye-bishop.
I-valve ye-pulmonary valve
I-pulmonary artery valve itholakala ekuphumeni kwesikhala se-pulmonary kusuka ku-ventricle efanele. I-pulmonary trunk ithwala igazi kusuka enhliziyweni kuya emaphashini. Ngokuqondile ngaphezu kwamagagasi e-valve we-artery yamapayipi kukhona izikhala ezincane ezigcwala igazi futhi zivimbela ukunamathela kwamagagasi odongeni lwe-tron pulmonary lapho i-valve ivulwa. Ngesikhathi i-systole ye-atria, igazi ligeleza ngokusebenzisa ama-valve e-tricuspid ne-mitral evulekile. Phakathi ne-systole ye-ventricles, ukwanda okungazelelwe kokucindezela kuholela ekuvaleni ama-valve atrioventricular. Lokhu kuvimbela ukubuya kwegazi ku-atria. Iziphazamiso ze-valve zibanjwe ngamakhotho, ezingavumeli ukuba zivule ngenxa yecindezelo kuma-ventricles. Ngemuva kokuvala ama-valve e-atrioventricular, igazi ligeleza phakathi kwamagagasi e-semilunar kuya esihlahleni se-pulmonary kanye ne-aorta. Ama-valve e-Semilunar avulekile ngenxa yokucindezela okukhulu ema-ventricles futhi awa ngokushesha ngokushesha lapho i-systole iphela futhi i-diastole iqala.
Umsebenzi Wenhliziyo
Ukusebenzisa i-phonendoscope, ungazwa ukuthi zonke izinhliziyo zihambisana nokubukeka kwezinhliziyo ezimbili. Ithoni yokuqala ivela ngesikhathi sokuvalwa kwama-valve atrioventricular, kanti okwesibili - ngesikhathi sokuvala i-valve yomthambo we-pulmonary of the valve aortic. Izindwangu zisuka emaphethelweni nasezindaweni eziphansi zamagagasi we-tricuspid ne-valve mitral, bese iqondiswa phansi futhi ifakwe emisipha yamapilla ehamba emgodini we-ventricular.
Isimiso sokusebenza kwamakhotho
Ama-chords avimbela ukuguqulwa kwamagagasi ama-valve e-atrioventricular emgodleni we-atrial ngaphansi kwesenzo somfutho wegazi ophezulu ngesikhathi se-systole ye-ventricular. Zihlanganiswe ezigodini eziseduze, eziqinisekisa ukuthi zivalwa ngokuqinile ngesikhathi se-ventricular futhi zivimbela ukugeleza kwegazi emuva ku-atrium. I-valve ye-aortic kanye ne-valve yamaphayiphi yamapayipi nayo ibizwa nangokuthi semilunar. Zitholakala endleleni ephuma egazini esuka enhliziyweni futhi ivimbela ukubuyela kwegazi ezingxenyeni ze-ventricles ngesikhathi se-diastole. Ngamunye walawa ma-valve amabili aqukethe amaqabunga aphezu kwenyanga, afana namapokhethi. Zinezicubu ezixhunyiwe futhi zihlanganiswe ne-endothelium. I-Endothelium yenza ama-valve ashelele.