Lub neej ntawm ib tug me txiv neej ua ntej yug hauv leej niam yog muab, tag nrho cov, ntau ntawm cov hlab ntsha, txoj hlab ntaws, qhov chaw mos. Nws tau txais ntau cov as-ham thiab oxygen ntawm nws niam cov ntshav. Kev sib pauv ntawm cov niam thiab tus me nyuam tsuas muab ob qho tseem ceeb hauv plab hnyuv ntxwm rau lub fetus - lub tsho me thiab cov chorion .
Chorion, tshwm ntawm thaum pib ntawm cev xeeb tub, tsim nrog fetus, ua ib tug pw luv. Thaum kawg ntawm thawj peb lub hlis, nws tau hloov mus rau hauv lub tsho me nyuam, uas tus me nyuam nrog rau ntawm phab ntsa ntawm lub tsev menyuam. Ntau xim yog them mus rau qhov chaw ntawm chorion.
Dab tsi yog qhov loj tshaj plaws hauv zos ntawm chorion?
Qhov kev mob siab ntawm chorion yuav ua tau rau sab pem hauv ntej, rov qab saum toj, los yog ib lub phab ntsa. Lub localization ntawm chorion nyob rau hauv lub phab ntsa (hauv qab ntawm lub tsev menyuam) kuj pom tias yog kev cai.
Yog hais tias fetus txuas nrog rau sab phab ntsa ntawm lub tsev menyuam, ces lawv hais tias chorion yog tsawg raws phab ntsa rau pem hauv ntej (2-3 cm ntawm lub tsev menyuam mus rau hauv lub ncauj tsev menyuam). Qhov kev kho ntawm cov chorion raws phab ntsa sab nraud yog kuaj tshaj 6% ntawm cov poj niam cev xeeb tub. Qhov chaw uas tau qhia txog kev kho ntawm chorion tsis yog kawg, Tk. feem ntau, chorion migrates los ntawm txoj haujlwm tsawg mus rau ib qho chaw siab zog, uas yuav pab kom tsis txhob muaj teeb meem cuam tshuam nrog qhov chaw nyob hauv chorion rau hauv thaj tsam ntawm lub pharynx.
Cov kev piam sij dab tsi yog txuam nrog kev nthuav qhia tsawg ntawm lub tsho me nyuam lossis kev chlorine?
Qhov kev txwv no ua rau kom qis qis dua, thiab tseem tuaj yeem ua rau ntshav ntog, ob qho tib si thaum cev xeeb tub thiab lub sijhawm ua haujlwm. Nws tseem yog qhov qhia txog kev ua kom me nyuam hnub nyoog qis thiab txawm tias qhov kev tshem tawm ntawm lub tsev me nyuam tom qab yug. Cov kev yug me nyuam muaj peev xwm tsuas yog thaum lub tsho me nyuam tsis nyob ze tshaj 2 cm rau qhov tawm.
Tshooj cai ntawm peb tsab xov xwm, peb yuav taw tes tias tus pojniam yuav tsum tsis txhob ntshai ntawm qhov kev ua haujlwm ntawm qhov chaw hauv chorion, qhov tseem ceeb tshaj plaws yog los them nqi rau lub sijhawm tsis tshua muaj kev nthuav qhia rau cov lus kawg thiab ua raws li tus kws kho mob sau ntawv.