Capillaries, qhov tsawg tshaj plaws thiab feem ntau ntawm cov hlab ntsha, tsim kev sib txuas ntawm cov hlab ntsha uas nqa ntshav tawm ntawm lub plawv (cov hlab ntsha) thiab cov hlab ntsha uas rov qab mus rau cov ntshav. lub plawv (veins). Lub luag haujlwm tseem ceeb ntawm capillaries yog kev sib pauv khoom ntawm cov ntshav thiab cov ntaub so ntswg.
Dab tsi nqa ntshav tawm ntawm lub siab?
Tus arteries (liab) nqa oxygen thiab cov as-ham tawm ntawm koj lub siab mus rau koj lub cev cov ntaub so ntswg. Cov hlab ntsha (xiav) coj cov ntshav tsis muaj oxygen rov qab mus rau lub plawv. Cov hlab ntsha pib nrog lub aorta, cov hlab ntsha loj tawm hauv plawv. Lawv nqa cov ntshav uas muaj oxygen tawm ntawm lub plawv mus rau tag nrho lub cev nqaij daim tawv.
Puas cov hlab ntshav khiav tawm ntawm lub siab?
Cov hlab ntsha nqa cov ntshav uas muaj oxygen tawm ntawm lub plawv mus rau tag nrho lub cev cov ntaub so ntswg. Lawv ceg ob peb zaug, ua me me thiab me me thaum lawv nqa cov ntshav ntxiv los ntawm lub plawv thiab hauv nruab nrog cev. Capillaries. Cov no yog cov hlab ntsha me me uas txuas cov hlab ntsha thiab cov hlab ntsha.
Puas capillaries nqa cov ntshav deoxygenated rau lub plawv?
Lub pulmonary arteries nqa cov ntshav deoxygenated los ntawm txoj cai ventricle mus rau alveolar capillaries ntawm lub ntsws kom tshem tawm carbon dioxide thiab nqa oxygen. Cov no tsuas yog cov hlab ntsha uas nqa cov ntshav deoxygenated, thiab suav tias yog cov hlab ntsha vim tias lawv nqa ntshav tawm ntawm lub plawv.
Lub siab puas muaj cov hlab ntsha?
Tshuaj xyuas los ntawm Dr Jacqueline Payne. Lub plawv yog cov leeg nqaij uas thawb cov ntshav los ntawm cov hlab ntsha nyob ib ncig ntawm lub cev. Lub plawv dhia txuas ntxiv, nqus qhov sib npaug ntawm ntau dua 14, 000 litres ntawm cov ntshav txhua hnub los ntawm tsib hom hlab ntsha tseem ceeb: cov hlab ntsha, cov hlab ntsha, cov hlab ntsha, cov hlab ntsha thiab cov hlab ntsha.
