Qhov txawv ntawm cov hlab ntsha thiab cov hlab ntsha yog cov hlab ntsha nqa cov ntshav oxygenated los ntawm lub plawv mus rau lwm qhov ntawm lub cev thaum cov hlab ntsha nqa cov ntshav deoxygenated los ntawm lwm qhov ntawm lub cev mus rau lub plawv.
Cov hlab ntsha muaj cov hlab ntsha thiab lub plawv. Cov hlab ntsha thiab cov hlab ntsha yog ob hom hlab ntsha uas xa cov ntshav mus rau hauv lub plawv. Ob leeg zoo li cov hlab ntsha, tab sis muaj qhov sib txawv ntawm cov hlab ntsha thiab cov leeg ntawm lawv cov qauv thiab kev ua haujlwm.
Dab tsi yog Artery?
Ib txoj hlab ntsha yog ib hom hlab ntsha. Tag nrho cov hlab ntsha tshwj tsis yog cov hlab ntsha pulmonary nqa cov ntshav oxygenated tawm ntawm lub plawv mus rau cov kab mob hauv lub cev txhawm rau muab cov pa oxygen thiab cov as-ham rau cov ntaub so ntswg thiab cov kabmob. Cov hlab ntsha loj tshaj plaws uas tawm hauv lub plawv yog aorta. Thaum nws loj tuaj, nws ua me me thiab faib rau hauv cov ceg ntoo thiab tom qab ntawd mus rau hauv cov hlab ntsha thiab cov hlab ntsha los ua cov txaj capillary qhov chaw sib pauv ntawm cov khoom siv. Tom ntej no, cov ntshav ntws mus rau hauv postcapillary venules, me me, thiab cov hlab ntsha loj thiab nws thiaj li mus rau superior thiab inferior vena cava nkag mus rau hauv lub plawv.
Daim duab 01: Artery
Tsis tas li ntawd, cov hlab ntsha tuaj yeem tiv taus siab vim lawv muaj cov phab ntsa tuab uas muaj peb txheej: tunica intima, tunica media thiab tunica externa. Tunica interna muaj ntau elongated endothelial hlwb nrog ib tug zoo-tsim elastic daim nyias nyias thaum tunica media yog cov leeg nqaij thiab muaj ntau elastic fibers. Tunica externa, uas yog txheej txheej sab nraud ntawm phab ntsa hlab ntsha, tsis tshua muaj kev tsim thiab tsis muaj zog. Lub lumen ntawm cov hlab ntsha yog nqaim thiab tsis muaj li qub. Cov dej ntws hauv cov hlab ntsha yog pulsatile; Nws yog palpable thiab qhia txog lub rhiab heev twj tso kua mis kev txiav txim ntawm lub plawv. Tom qab tuag lawm, cov hlab ntsha tau pom los ua ntshav.
Vim yog dab tsi?
Ib leeg yog ib hom hlab ntsha uas rov qab cov ntshav deoxygenated los ntawm cov hlab capillary mus rau lub plawv kom nkag mus rau hauv lub ntsws kom tau oxygenated. Txawm li cas los xij, cov hlab ntsha pulmonary nqa cov ntshav oxygenated. Ntshav ntws mus rau hauv cov hlab ntsha qis qis qis qis.
Daim duab 02: Vein
Veins kuj muaj peb txheej txheej txheem ntawm cov hlab ntsha, tab sis cov elastic thiab cov leeg nqaij yog cov yam ntxwv tsawg dua. Cov phab ntsa ntawm cov leeg yog nyias thiab tsis tshua muaj elastic dua piv rau cov hlab ntsha. Nyob rau hauv lub tunica interna, endothelial hlwb tsis tiaj tus, thiab cov elastic membrane tsis zoo tsim. Tunica media tsis tshua muaj nqaij thiab muaj ob peb elastic fibers. Txawm li cas los xij, cov leeg tau tsim tau zoo thiab muaj zog tunica externa piv rau cov hlab ntsha. Lub lumen yog qhov dav thiab muaj cov li qub uas tso cai rau cov ntshav ntws mus rau unidirectional. Venous pulsations tsis palpable tab sis pom. Txawm tias tom qab tuag, cov leeg muaj ntshav.
Dab tsi zoo sib xws ntawm Artery thiab leeg?
- Artery thiab vein yog ob hom hlab ntsha thiab ob leeg nqa ntshav.
- Tsis tas li, ob lub nkoj muaj peb txheej phab ntsa.
- Cov kab mob capillary txuas cov hlab ntsha thiab cov leeg.
- Ntxiv mus, ob leeg hlab ntsha thiab cov hlab ntsha thauj ntshav unidirectionally.
- Thiab, lawv suav nrog cov nqaij mos.
Dab tsi ntawm Artery thiab Vein?
Cov hlab ntsha nqa cov ntshav oxygenated tawm ntawm lub plawv thaum cov hlab ntsha nqa cov ntshav deoxygenated mus rau lub plawv. Yog li, qhov no yog qhov sib txawv tseem ceeb ntawm cov hlab ntsha thiab cov hlab ntsha. Tsis tas li ntawd, phab ntsa ntawm cov hlab ntsha yog thicker thiab elastic dua piv rau cov hlab ntsha. Lwm qhov sib txawv ntawm cov hlab ntsha thiab cov hlab ntsha yog cov hlab ntsha tau sib sib zog nqus thaum cov hlab ntsha muaj ntau dua.
Tsis tas li ntawd, lub lumen ntawm cov hlab ntsha yog nqaim, tab sis nyob rau hauv cov hlab ntsha, lub lumen yog dav. Ntxiv mus, qhov sib txawv tseem ceeb ntawm cov hlab ntsha thiab cov hlab ntsha yog tias cov hlab ntsha tsis muaj li qub, tab sis cov leeg muaj li qub los tiv thaiv rov qab. Tom qab kev tuag, cov hlab ntsha ua npliag, tab sis cov leeg tsis ua. Yog li, qhov no yog lwm qhov sib txawv ntawm cov hlab ntsha thiab cov leeg.
Summary – Artery vs Vein
Muaj peb hom hlab ntsha, thiab cov hlab ntsha thiab cov hlab ntsha yog ob hom ntawm lawv. Cov hlab ntsha nqa ntshav los ntawm lub plawv mus rau lwm qhov ntawm lub cev thaum cov hlab ntsha nqa ntshav los ntawm lwm qhov ntawm lub cev mus rau lub plawv. Tsis tas li ntawd, cov hlab ntsha muaj cov ntshav oxygenated, thaum cov hlab ntsha muaj cov ntshav deoxygenated. Tsis tas li ntawd, cov hlab ntsha yog thicker thiab elastic dua thiab muaj qhov nqaim lumen piv rau cov leeg. Txawm li cas los xij, ob qho tib si muaj peb-txheej phab ntsa. Tab sis, cov hlab ntsha tsis muaj li qub thaum cov hlab ntsha muaj li qub los tiv thaiv cov ntshav rov qab. Yog li, qhov no yog cov ntsiab lus ntawm qhov sib txawv ntawm cov hlab ntsha thiab cov leeg.
