![Cov leeg puas muaj lumen loj dua cov hlab ntsha? Cov leeg puas muaj lumen loj dua cov hlab ntsha?](https://i.answers-medical.com/preview/medical-health/13867333-do-veins-have-larger-lumen-than-arteries-j.webp)
Video: Cov leeg puas muaj lumen loj dua cov hlab ntsha?
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2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
Cov hlab ntsha nqa ntshav tawm ntawm lub plawv thiab leeg xa ntshav mus rau lub plawv. Cov leeg yog feem ntau loj dua hauv txoj kab nruab nrab, nqa ntshav ntau ntxiv thiab muaj thinner phab ntsa nyob rau hauv kev faib ua feem rau lawv lub lumen . Arteries yog me dua, muaj phab ntsa tuab nyob rau hauv kev faib ua feem rau lawv lub lumen thiab nqa ntshav hauv siab dua tshaj cov leeg.
Hais txog qhov no, vim li cas cov leeg ntshav muaj lub lumen loj?
Hauv lwm lo lus, hauv kev sib piv rau cov hlab ntsha, venules thiab leeg tiv lub siab qis dua los ntawm cov ntshav uas ntws los ntawm lawv. Lawv cov phab ntsa yog qhov nqaim thiab lawv lub lumens yog sib thooj loj dua nyob rau hauv txoj kab uas hla, tso ntshav ntau ntxiv nrog lub nkoj tsis kam.
Ib tus kuj yuav nug, lumen hauv cov hlab ntsha yog dab tsi? Hauv biology, a lub lumen (plural lumina) yog qhov chaw sab hauv ntawm cov qauv tubular, xws li cov hlab ntsha lossis cov hnyuv. Nws los ntawm Latin lub lumen , lub ntsiab lus 'qhib'.
Hauv qhov no, cov hlab ntsha puas muaj lub lumen loj?
Cov leeg nqa cov ntshav unoxygenated mus rau lub plawv, deb ntawm cov ntaub so ntswg ntawm qhov siab li ntawd lub lumen yog loj . Ntshav txav qeeb dua thiab feem ntau tawm tsam lub ntiajteb thiaj li li qub thiab a loj lumen xyuas kom nws tseem thauj tau zoo. Capillaries muaj qhov tsawg tshaj plaws lub lumen tab sis txheeb ze rau lawv qhov loj me lub lumen yog lawm loj.
Puas yog cov hlab ntsha lossis cov leeg tuab?
Cov hlab ntsha ntsib kev yoj siab li ntshav tau tso los ntawm lub plawv. Qhov no tuaj yeem xav tias yog "mem tes." Vim qhov no siab phab ntsa ntawm cov hlab ntsha yog ntau tuab tshaj cov ntawm leeg . Lub nkoj phab ntsa ntawm leeg yog thinner tshaj cov hlab ntsha thiab tsis muaj ntau li tunica media.
Pom zoo:
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