Fenestrated capillaries Cov no muaj nyob hauv qee qhov tissues qhov twg muaj kev sib pauv molecular nrog cov ntshav xws li cov hnyuv me, cov qog endocrine thiab lub raum. Cov 'fenestrations' yog qhov pores uas yuav tso cai rau cov molecules loj dua. Cov capillaries no muaj permeable ntau dua li cov capillaries tas li.
Puas capillaries fenestrated?
Fenestrated capillaries yog "leakier" dua li cov hlab ntsha txuas ntxiv. Lawv muaj cov pores me me, ntxiv rau qhov sib txawv me me ntawm cov hlwb, hauv lawv cov phab ntsa uas tso cai rau kev sib pauv ntawm cov molecules loj. Hom capillary no muaj nyob rau hauv thaj chaw uas xav tau ntau qhov sib pauv ntawm koj cov ntshav thiab cov ntaub so ntswg.
Puas capillaries txuas ntxiv lossis fenestrated?
Nruam: Cov capillaries no tsis muaj perforations thiab cia tsuas me me molecules dhau mus. Lawv muaj nyob rau hauv cov nqaij, tawv nqaij, rog, thiab paj hlwb. Fenestrated: Cov capillaries no muaj cov pores me me uas tso cai rau cov molecules me los ntawm thiab nyob hauv cov hnyuv, ob lub raum, thiab cov qog endocrine.
Dab tsi yog cov kab mob tsis fenestrated?
Cov capillaries muaj qhov qhib me me hauv lawv cov endothelium hu ua fenestrae lossis fenestra, uas yog 80 mus rau 100 nm inch. Fenestra muaj tsis-membraneous, permeable membrane, uas yog diaphragm zoo li thiab spanned nrog fibrils. Qhov kev npaj no tso cai rau kev txav ceev ntawm macromolecules hauv thiab tawm ntawm lub capillary.
Peb hom kab mob sib txawv yog dab tsi?
Muaj peb hom capillary:
- ntxawm.
- fenestrated.
- tsis txuas ntxiv.
