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Video: Puas yog cov leeg muaj elastic fibers?
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2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
Cov leeg yog ua los ntawm nyias txheej nrog ob peb ncig elastic fibers thiab nqaij fibers . Qhov no yog vim ntshav ua tsis ntws hauv pulses thiab yog li ntawd leeg phab ntsa tsis tuaj yeem pab tso ntshav tawm. Cov leeg kuj muaj nyias phab ntsa uas tso cai rau cov leeg nyob ze los nias tawm tsam lawv kom lawv ua tiaj.
Tib neeg kuj nug, cov leeg puas muaj cov ntaub so ntswg elastic?
Ib yam li cov hlab ntsha, peb txheej ua rau leeg phab ntsa. Tab sis tsis zoo li cov hlab ntsha, lub venous siab yog tsawg. Cov leeg yog phab ntsa nyias thiab tsawg dua ywj . Cov yam ntxwv no tso cai rau leeg kom tuav tau qhov feem pua ntawm cov ntshav siab heev.
Tsis tas li ntawd, cov hlab ntsha puas muaj collagen fibers? Lub tunica media, uas nyob rau hauv cov hlab ntsha yog tsim los ntawm cov leeg thiab elastic fibers , yog thinner hauv a leeg thiab muaj cov nqaij mos thiab cov ntaub so ntswg tsawg dua, thiab sib npaug ntau dua collagen fibers ( collagen , cov protein ntau fibrous, yog lub hauv paus txhawb nqa hauv cov ntaub so ntswg sib txuas).
Ib yam li ib tug yuav nug, puas capillaries muaj elastic fibers?
Lub tunica intima yog nyob ib puag ncig los ntawm ib daim nyias nyias uas muaj ywj fibers khiav mus rau lub nkoj. Capillaries muaj tsuas yog nyias endothelial txheej ntawm cell nrog ib tug nyias txheej ntawm connective ntaub so ntswg.
Cov phab ntsa ntawm cov hlab ntsha yog dab tsi?
Cov phab ntsa ntawm koj leeg yog ua txog ntawm peb txheej sib txawv: Tunica externa. Qhov no yog txheej txheej ntawm lub leeg phab ntsa, thiab nws kuj yog lub thickest. Nws yog feem ntau ua nce ntawm connective ntaub so ntswg.
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