Video: Koj txhais li cas los ntawm Extraembryonic membrane?
2024 Tus sau: Edward Hancock | [email protected]. Kawg hloov kho: 2023-12-16 01:32
Ib extraembryonic daim nyias nyias yog ib ntawm cov daim nyias nyias uas pab nyob rau hauv txoj kev loj hlob ntawm lub embryo. Xws li daim nyias nyias tshwm sim nyob rau hauv ntau yam tsiaj los ntawm tib neeg mus rau kab. Lawv pib los ntawm embryo, tab sis yog tsis suav tias yog ib feem ntawm nws.
Hais txog qhov no, dab tsi yog Extraembryonic daim nyias nyias thiab lawv txoj haujlwm?
Extraembryonic daim nyias nyias yog cov khaubncaws sab nraud povtseg ntawm lub embryo nyob rau hauv lub tsev menyuam. Muaj plaub txheej: lub amnion , yolk sac, allantois, thiab chorion. Cov amnion yog lub innermost txheej, enclosing lub embryo nyob rau hauv lub amnion kua, uas tiv thaiv nws los ntawm mechanical kev nyuaj siab.
Ib yam li ntawd, plaub Extraembryonic daim nyias nyias yog dab tsi uas yog tsim los ntawm peb txheej kab mob? 1B). Txhua amniotes muaj cov hauv qab no plaub extraembryonic Cheebtsam: amnion, chorion, yolk sac, thiab allantois (Fig. 1C). Zoo li cov ntaub so ntswg intraembryonic, cov no extraembryonic cov ntaub so ntswg yog tsim los ntawm cov cell uas sawv cev rau peb txheej kab mob : ectoderm, mesoderm , thiab endoderm.
Tom qab, lo lus nug yog, hom embryos twg muaj Extraembryonic daim nyias nyias?
Cov tsiaj nyeg thiab noog (thiab txawm tias cov tsiaj reptiles) tsim plaub hom kab mob extraembryonic los tiv thaiv lub embryo: amnion, yolk qab , allantois , thiab chorion . Cia peb tshawb nrhiav cov no kom ntxaws. Nws yog feem ntau digestive nyob rau hauv muaj nuj nqi yog li ua raws li ntxiv embryonic plab.
Dab tsi ua rau Extraembryonic membranes?
Cytotrophoblast: Lub cell loj jutting tawm ntawm tus ncej. Yuav tsim lub extraembryonic daim nyias nyias . Epiblast Cells: Los ntawm sab hauv cell loj, yuav kawg muab sawv mus rau peb txheej kab mob thiab tag nrho embryo.
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