Video: Dab tsi yog hluav taws xob ua haujlwm ntawm lub plawv?
2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
Cov lub plawv hluav taws xob lawv
SA node (sinoatrial node) - lub npe hu ua lub plawv ntuj pacemaker. Qhov kev xav pib hauv pob me me ntawm cov hlwb tshwj xeeb nyob hauv sab xis atrium, hu ua SA node. Cov kev ua haujlwm hluav taws xob kis los ntawm phab ntsa ntawm atria thiab ua rau lawv cog lus.
Hais txog qhov no, dab tsi ua rau hluav taws xob ua haujlwm hauv plawv?
Ib hluav taws xob kev txhawb zog yog tsim los ntawm cov leeg ntshav (tseem hu ua sinoatrial node, lossis SA node). Cov hluav taws xob kev txhawb nqa taug kev los ntawm txoj kev coj ua thiab ua cov lub plawv ventricles kom cog lus thiab tso ntshav tawm.
Ib qho ntxiv, lub plawv dhia ntawm nws tus kheej li cas? Cov plawv tau tuav ntawm nws tus kheej Cov plawv muaj nws tus kheej hluav taws xob uas ua rau nws tuav thiab tso ntshav. Vim li no, cov plawv tuaj yeem txuas ntxiv mus tuav rau ib ntus tom qab lub hlwb tuag, lossis tom qab raug tshem tawm ntawm lub cev. Cov plawv yuav khaws ntaus tsuav nws muaj oxygen.
Tsis tas li ntawd, lub tshuab hluav taws xob ntawm lub plawv yog dab tsi?
SA node (hu ua pacemaker ntawm plawv ) xa tawm ib qho hluav taws xob impulse . Saum plawv chav (atria) daim ntawv cog lus. AV node xa ib qho kev xav mus rau hauv lub ventricles. Qhov qis plawv chav (ventricles) daim ntawv cog lus lossis twj tso kua mis.
Lub plawv ua haujlwm ua haujlwm li cas?
Lub hauv paus tseem ceeb ntawm kev kho plawv yog SA node, AV node, pob ntawm Nws, nras ceg, thiab Purkinje fibers. Los ntawm qhov ntawd, lub teeb liab txav mus rau AV node, dhau los ntawm Nws pawg, nqes cov ceg ntoo, thiab dhau los ntawm Purkinje fibers, ua rau lub qhov ncauj sib cog lus.
Pom zoo:
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