Cov hlwb myocardial contractile ua rau feem ntau (99 feem pua) ntawm cov hlwb hauv atria thiab ventricles. Contractile cells ua impulses thiab muaj lub luag haujlwm rau kev cog lus uas tso ntshav los ntawm lub cev. Cov hlwb ua myocardial (1 feem pua ntawm cov hlwb) tsim cov txheej txheem ntawm lub plawv.
Dab tsi yog qhov sib txawv ntawm cov hlwb contractile thiab Autorhythmic cells ntawm lub plawv?
Cov hlwb autohythmic yog cov hlwb tshwj xeeb uas tsim lawv tus kheej lub peev xwm ua haujlwm. Contractile cells yog cov hlwb uas tsis tuaj yeem tsim lawv tus kheej lub peev xwm tab sis ua rau kev cog lus txhua yam. … Cov kab mob sib kis tsim muaj 99% ntawm cov cardiomyocytes, yog li pom thoob plaws hauv lub plawv.
Cov hlwb qog nqaij hlav nyob qhov twg hauv lub siab?
Lawv nyob hauv tus SA node, AV node, pob ntawm Nws, sab xis thiab sab laug bundle ceg, thiab Purkinje fibers. Lawv tsim lub conduction system ntawm lub plawv. Cov hlwb contractile yog cov leeg nqaij uas ua rau lub plawv contraction ib zaug depolarized.
Dab tsi yog qhov txawv ntawm pacemaker cells thiab contractile cells?
The pacemaker cells teem lub plawv dhia. Lawv yog cov anatomically txawv ntawm cov contractile hlwb vim lawv tsis muaj sarcomeres thiab yog li ntawd tsis pab rau lub contractile quab yuam ntawm lub plawv. Muaj ntau ntau yam pacemakers hauv plawvtab sis lub sinoatrial node (SA) yog qhov ceev tshaj plaws.
cov hlwb ua dab tsi hauv lub siab?
Ob hom hlwb hauv koj lub siab ua rau lub teeb liab hluav taws xob tswj koj lub plawv dhia: Ua cov hlwb nqa koj lub plawv hluav taws xob teeb liab. Cov leeg nqaij ua rau koj lub plawv lub tsev cog lus, ib qho kev ua los ntawm koj lub plawv hluav taws xob teeb liab.
