Video: Vim li cas capillaries muaj me me lumen?
2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
Phagocytes kuj tseem tuaj yeem hla cov pores no los pab tua cov kab mob. Tsis tas li ntawd, cov lub lumen ntawm cov hlab ntsha yog nqaim heev. Qhov no txhais tau tias ntau cov hlab ntsha tuaj yeem haum hauv a me me qhov chaw, ua rau thaj tsam thaj tsam rau kev nthuav dav.
Tsis tas li ntawd, puas capillaries muaj me me lumen?
Capillaries yog cov hlab ntsha ntawm me me txoj kab uas hla (4 txog 10 microns) uas nws phab ntsa raug txo kom qis qis qis ib puag ncig los ntawm cov hauv qab daus, ob peb pericytes, thiab cov ntaub so ntswg sib txuas. Qhov nqaim lumen ntawm capillary tso cai dhau ntawm cov qe ntshav liab hauv ib cov ntaub ntawv.
Ib yam li ntawd, lumen hauv capillaries 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 txoj hnyuv. Nws los ntawm Latin lub lumen , lub ntsiab lus 'ib qho qhib'. Nws tuaj yeem xa mus rau: Sab hauv ntawm lub nkoj, xws li qhov chaw nruab nrab hauv cov hlab ntshav, leeg ntshav lossis cov hlab ntsha los ntawm cov ntshav ntws.
Vim li ntawd, vim li cas cov hlab ntsha thiaj li muaj lub lumen me me?
Capillaries yog tsim los ntawm ib txheej ntawm endothelial hlwb nyob ib ncig ntawm heev lumen me me . Molecules tau yooj yim txav mus rau hauv thiab tawm ntawm lub cov hlab ntsha ntawm diffusion. Qhov no tso cai rau cov zaub mov, roj thiab cov khoom pov tseg coj mus rau thiab los ntawm txhua lub cell hauv lub cev.
Vim li cas cov hlab ntsha muaj lub lumen me dua li cov leeg?
Cov hlab ntsha thiab arterioles muaj phab ntsa tuab tshaj cov leeg thiab venules vim tias lawv nyob ze rau lub plawv thiab tau txais cov ntshav uas tau nce siab ntawm qhov siab dua (Daim duab 2). Cov hlab ntsha muaj lumens me dua cov leeg , ib tug yam ntxwv uas pab tswj lub siab ntawm cov ntshav mus rau hauv lub system.
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