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Video: Cov hlwb puas pom nyob hauv plawv nyob qhov twg?
![Video: Cov hlwb puas pom nyob hauv plawv nyob qhov twg? Video: Cov hlwb puas pom nyob hauv plawv nyob qhov twg?](https://i.ytimg.com/vi/HlDnBGJM6uA/hqdefault.jpg)
2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
Feem ntau ntawm cov leeg hlwb hauv plawv yog cov kab mob sib kis.
Lub autorhythmic hlwb nyob rau hauv cov cheeb tsam no: Sinoatrial (SA), los yog sinus, node. Atrioventricular (AV) node.
Tib neeg kuj nug, dab tsi yog contractile hlwb ntawm lub plawv?
Lub myocardial cov kab mob sib kis ua qhov loj (99 feem pua) ntawm hlwb nyob rau hauv atria thiab ventricles. Cov kab mob sib kis ua impulses thiab yog lub luag hauj lwm rau contractions uas tso ntshav los ntawm lub cev. Kev ua haujlwm ntawm myocardial hlwb (1 feem pua hlwb ) tsim cov conduction system ntawm lub plawv.
Ib sab saum toj no, pom cov cell dab tsi hauv plawv? Muaj ob hom cell hauv plawv: tus cardiomyocytes thiab lub plawv pacemaker cells. Cardiomyocytes ua kom lub atria (chambers uas cov ntshav nkag mus rau hauv lub plawv) thiab lub ventricles (chamber uas cov ntshav yog sau thiab pumped tawm ntawm lub plawv).
Hais txog qhov no, qhov twg yog myocytes nyob hauv plawv?
Nws yog qhov tsis tuaj yeem ua haujlwm, cov leeg nqaij uas tsim los ua cov ntaub so ntswg tseem ceeb ntawm phab ntsa ntawm plawv . Lub myocardium tsim ib txheej tuab nruab nrab nruab nrab ntawm txheej txheej ntawm lub plawv phab ntsa (epicardium) thiab txheej sab hauv (endocardium), nrog cov ntshav nkag los ntawm cov hlab ntshav ncig.
Puas muaj cov ntaub so ntswg nyob hauv plawv?
Lub plawv yog tsim los ntawm plawv nqaij , tshwj xeeb cov ntaub so ntswg, li qub, cov hlab ntsha thiab cov nqaij txuas. Plawv nqaij , myocardium, muaj kev sib tw nqaij cell, cardiomyocytes, nrog ib tug centrally tso nucleus.
Pom zoo:
Qhov teeb meem grey nyob hauv lub hlwb nyob qhov twg?
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Qhov teeb meem grey hais txog cov neurons tsis sib xws thiab lwm lub hlwb ntawm lub hauv paus paj hlwb. Nws muaj nyob hauv lub hlwb, lub paj hlwb thiab lub paj hlwb, thiab nthuav tawm thoob plaws hauv tus txha caj qaum
Cov hauv paus hauv siab dab tsi qhia pom tus neeg cawm neeg nyob qhov twg los thawb kom CPR nrawm rau ntawm tus menyuam mos?
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Compression Point thiab Qhov tob Muab ob ntiv tes rau ntawm qhov chaw ntawm tus menyuam mos lub hauv siab, ncaj qha rau ntawm lub sternum thiab me ntsis hauv qab ntawm lub txiv mis. Qhov tob ntawm compression rau cov me nyuam mos yog hais txog 1½ ntiv tes (los yog 1/3 lub anteriorposterior txoj kab uas hla ntawm lub hauv siab)
Lub paj hlwb nyob hauv lub hlwb nyob qhov twg?
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Frontal lub cev
Dab tsi yog cov qauv pom hauv lub qhov muag yaj uas tsis pom nyob hauv tib neeg qhov muag?
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Lub tapetum lucidum, uas tsis pom nyob rau hauv tib neeg lub qhov muag, ua haujlwm kom pom lub teeb mus rau retina
Qhov twg feem ntau digestion nyob rau hauv cov hnyuv nyob qhov twg?
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Jejunum yog ib nrab ntawm txoj hnyuv me, nruab nrab ntawm duodenum thiab ileum. Feem ntau digestion thiab assorption nyob rau hauv lub jejunum