![Cov hlab ntsha puas muaj cov txheej txheem elastic? Cov hlab ntsha puas muaj cov txheej txheem elastic?](https://i.answers-medical.com/preview/medical-health/13956363-do-veins-have-an-elastic-layer-j.webp)
Video: Cov hlab ntsha puas muaj cov txheej txheem elastic?
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2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
Arteries thiab leeg muaj peb cov ntaub so ntswg txheej . Qhov nruab nrab txheej (tunica media) yog tuab thiab muaj cov ntaub so ntswg hauv cov hlab ntsha ntau dua li hauv leeg . Nws muaj cov txheej txheem ncig ywj fibers, cov ntaub so ntswg sib txuas, thiab cov leeg nqaij du.
Yog li ntawd, cov hlab ntsha puas elastic?
Cov leeg Ntshav ntws los ntawm venules mus rau hauv loj leeg . Ib yam li cov hlab ntsha, peb txheej ua rau cov leeg phab ntsa Tab sis tsis zoo li cov hlab ntsha, venous siab yog tsawg. Cov leeg yog phab ntsa nyias thiab tsawg dua ywj.
Ib qho ntxiv, cov hlab ntsha puas muaj cov leeg txheej? Cov leeg . Cov leeg nqa ntshav mus rau lub plawv. Cov phab ntsa ntawm cov leeg muaj tib peb txheej raws li cov hlab ntsha. Txawm tias tag nrho cov txheej yog tam sim no, muaj tsawg dua tus cov leeg thiab cov ntaub so ntswg sib txuas.
Tsis tas li ntawd, cov leeg puas muaj daim nyias nyias?
Cov leeg . Ib sab hauv elastic membrane yog tsis tuaj. Lub tunica xov xwm kuj yog nyias. Ib qho txiaj ntsig generalization yog tias cov hlab ntsha muaj ib phab ntsa tuab thiab ib lub lumen me me, whereas a muaj leeg ib tug kuj nyias phab ntsa thiab ib tug dav lumen.
Peb cov hlab ntsha yog dab tsi?
Txhua cov hlab ntsha thiab cov leeg muaj peb txheej. Cov txheej sab hauv yog hu ua tunica xav . Cov leeg nruab nrab txheej yog hu ua tunica xov xwm , thiab txheej txheej sab nraud yog hu ua tunica kev lom zem . Vim tias capillaries tsuas yog ib txheej txheej ntawm cov tuab, lawv tsuas muaj ib tunica xav.
Pom zoo:
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Cov hlab ntsha muaj cov leeg ntau dua thiab muaj me dua, puag ncig lub lumens (qhov chaw sab hauv) dua li cov leeg. Nws yog tsim los ntawm cov leeg nqaij du thiab elastic fibers hu ua elastin. Cov txheej ntawm elastin cais cov tunica media los ntawm lwm cov txheej. Tunica media yog txheej tuab tshaj plaws hauv cov hlab ntsha
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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
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Cov hlab ntsha tau pom tias yog nqa cov ntshav oxygenated mus rau cov ntaub so ntswg, thaum cov leeg nqa cov ntshav deoxygenated rov qab mus rau lub plawv. Txawm li cas los xij, hauv txoj hlab ntsws, cov hlab ntsha nqa cov ntshav deoxygenated los ntawm lub plawv mus rau lub ntsws, thiab cov hlab ntshav rov qab ntshav los ntawm lub ntsws mus rau lub plawv
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