![Dab tsi yog qhov hla ntu ntawm cov hlab ntsha? Dab tsi yog qhov hla ntu ntawm cov hlab ntsha?](https://i.answers-medical.com/preview/medical-health/14042407-what-is-cross-sectional-area-of-blood-vessels-j.webp)
Video: Dab tsi yog qhov hla ntu ntawm cov hlab ntsha?
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2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
Cov ntu ntu ntu , ntawm ib feem ntawm vasculature raug coj los ua qhov sib npaug ntawm txhua qhov cov nkoj ntawm qib ntawd thiab tsis yog ib leeg lub nkoj tus kheej. Lub caliber ntawm lub cov hlab ntsha hloov raws li lub aorta faib rau hauv cov hlab ntsha, arterioles thiab capillaries thaum lub sij hawm thauj ntshav mus rau cov ntaub so ntswg.
Ib yam li ntawd, nws tau nug, cov hlab ntsha twg muaj qhov loj tshaj plaws ntawm qhov chaw hla?
Tag nrho cross sectional cheeb tsam ntawm cov hlab ntsha . Nco ntsoov tias qhov ceev ntawm ntws yog qeeb tshaj plaws nyob rau hauv cov hlab ntsha , uas muaj qhov loj tshaj plaws tag nrho cov hla ntu ntu
Ib yam li ntawd, dab tsi ua rau cov hlab ntsha? Cov Ntsiab Lus
- Cov hlab ntsha muaj cov hlab ntsha, arterioles, capillaries, venules, thiab veins.
- Cov hlab ntsha thiab cov hlab ntsha yog tsim los ntawm peb cov ntaub so ntswg.
- Cov txheej txheej tuab ntawm lub nkoj (tunica adventitia lossis tunica externa) yog ua los ntawm cov ntaub so ntswg sib txuas.
thaj tsam hla ntu cuam tshuam li cas cov ntshav ntws?
Tus nqi, lossis tshaj tawm, ntawm ntshav ntws nws txawv inversely nrog tag nrho tus ntoo khaub lig - cheeb tsam ntawm ntshav cov nkoj. Raws li tag nrho tus ntoo khaub lig - cheeb tsam ntawm cov hlab ntsha nce, qhov nrawm ntawm ntws txo. Raws li lub nkoj txoj kab nqes qis, qhov ua haujlwm nce ntxiv thiab ntshav ntws txo.
Dab tsi yog occlusion ntawm cov hlab ntsha?
Vascular occlusion yog a thaiv ntawm a cov hlab ntsha , feem ntau nrog cov ntshav txhaws. Nws txawv ntawm thrombosis nyob rau hauv uas nws tuaj yeem siv los piav txog txhua yam ntawm thaiv , tsis yog ib tug tsim los ntawm ib tug clot. Thaum nws tshwm sim hauv cov hlab ntsha loj, nws tuaj yeem, qee zaum, ua rau cov hlab ntsha sib sib zog nqus.
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Sab nraub qaum ntu tuaj yeem cuam tshuam kev puas tsuaj rau sab laug ventricle tshwm sim los ntawm ntshav siab, lub plawv nres, lub plawv aortic tsis ua haujlwm, kab mob hauv lub plawv, lub plawv tsis ua haujlwm, lossis lwm yam mob plawv. Yog tias cov ceg ntoo thaiv tau ua rau muaj cov tsos mob, tom qab ntawd qhov teeb meem yuav hnyav txaus kom xav tau lub tshuab ua kom nrawm dua
Dab tsi yog qhov txawv ntawm cov hlab ntsha thiab cov hlab ntsha capillaries?
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Piav qhia: Cov hlab ntshav nqa ntshav nyob hauv siab los ntawm lub plawv mus rau cov kabmob thiab cov nqaij. Lawv cov phab ntsa feem ntau yog tuab dua li cov leeg. Capillaries yog qhov sib txuas ntawm cov hlab ntsha thiab cov leeg thiab me me heev, Cov ntaub so ntswg qee zaum pom tawm thiab rov nco qab los ntawm cov qog ntshav thiab rov qab los rau cov leeg ntshav
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Cov hlab ntsha nqa ntshav tawm ntawm lub plawv; Lub ntsiab hlab ntsha yog aorta. Capillaries nqa ntshav tawm ntawm lub cev thiab pauv cov as-ham, pov tseg, thiab oxygen nrog cov ntaub so ntswg ntawm qib cellular. Cov leeg ntshav yog cov hlab ntshav uas coj cov ntshav rov qab los rau hauv lub plawv thiab tso ntshav tawm ntawm cov kabmob thiab cov ceg
Puas yog Neuroglia tsim cov hlab ntsha hauv cov hlab ntsha hauv nruab nrab cov hlab ntsha?
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Muaj plaub hom neuroglia pom nyob hauv nruab nrab lub paj hlwb: Astrocytes - tswj cov ntshav lub hlwb teeb meem thiab khaws cov tshuaj ib puag ncig los ntawm kev siv cov ions rov qab thiab cov tshuaj xa xov mus rau lub cev. Oligodendrocytes - myelinate axons nyob rau hauv lub hauv nruab nrab lub paj hlwb thiab muab tag nrho cov txheej txheem txheej txheem
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Hauv cov neeg laus uas muaj tus kab mob coronary artery, sab laug bundle ceg thaiv yog txuam nrog kev pheej hmoo ntawm kev tuag ntau dua. Qhov no tshwj xeeb tshaj yog rau cov neeg uas muaj lub plawv tsis ua haujlwm. Sab laug bundles ceg thaiv kuj txuas nrog kev pheej hmoo ntawm kev tuag ntau dua tom qab lub plawv nres