circulatory system …an sab hauv ntawm du endotheliumnpog los ntawm qhov chaw ntawm cov ntaub so ntswg elastic. Lub tunica media, los yog lub tsho nruab nrab, yog tuab hauv cov hlab ntsha, tshwj xeeb tshaj yog nyob rau hauv cov hlab ntsha loj, thiab muaj cov leeg nqaij sib txuas nrog elastic fibers.
endothelium hauv cov hlab ntsha yog dab tsi?
Lub endothelium yogib daim nyias nyias uas kab hauv lub plawv thiab cov hlab ntsha. Cov hlwb endothelial tso tawm cov tshuaj uas tswj cov vascular so thiab contraction nrog rau cov enzymes uas tswj cov ntshav txhaws, tiv thaiv kev ua haujlwm thiab platelet (ib yam khoom tsis muaj xim hauv cov ntshav) adhesion.
Puas yog endothelium folded nyob rau hauv cov hlab ntsha?
Lub tunica intima (Tshiab Latin "lub tsho sab hauv"), lossis intima luv luv, yog tunica sab hauv (txheej) ntawm cov hlab ntsha lossis cov leeg. Nws yog tsim los ntawm ib txheej ntawm endothelial hlwb thiab yog txhawb los ntawm ib tug internal elastic lamina. Cov hlwb endothelial yog nyob rau hauv kev sib cuag nrog cov ntshav ntws.
Cov hlab ntsha puas muaj cov phab ntsa du?
phab ntsa ntawm cov hlab ntsha muaj peb txheej. Cov txheej sab hauv tshaj plaws, tunica intima (tseem hu ua tunica interna), yog qhov yooj yim squamous epithelium ncig los ntawm cov ntaub so ntswg hauv qab daus daim nyias nyias nrog elastic fibers. Cov txheej nruab nrab, cov tunica media, feem ntau yog cov leeg duthiab feem ntau yog txheej tuab tshaj plaws.
Puas yog cov hlab ntsha me me nrog cov endothelium?
Cov kab mob endotheli altsim ib-cell tuab phab ntsa txheej hu ua endothelium uas kab tag nrho peb cov hlab ntsha xws li cov hlab ntsha, arterioles, venules, veins thiab capillaries. … Capillaries nrog ib tug tas mus li endothelium muaj nyob rau hauv lub ntsws, cov leeg nqaij thiab hauv nruab nrab lub paj hlwb.
