2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Lub extraembryonic mesoderm nyob rau hauv tib neeg embryos ntseeg tau tsim los ntawm the hypoblast hypoblast Endoderm progenitor cells ua rau lub plab hnyuv thiab mus rau tag nrho cov ntaub so ntswg endoderm. Hauv kev txhim kho nas, cov hlwb no tshwm sim nyob rau hauv anterior primitive streak (nruab nrab mus rau lig streak) thiab posterior epiblast (pre thiab ntxov streak). https://discovery.lifemapsc.com › endoderm-progenitor-cells
Endoderm Progenitor Cells (APS) - LifeMap Discovery
(txawm tias qhov kev txhawb nqa trophoblast kuj yog plausible), thaum nyob rau hauv nas, nws tshwm sim los ntawm caudal kawg ntawm lub primitive streak primitive streak Lub primitive streak yog tus qauv uas tsim nyob rau hauv lub blastula thaum lub sij hawm thaum ntxov.ntawm avian, tsiaj reptilian thiab mammalian embryonic kev loj hlob. Nws ua rau ntawm lub dorsal (rov qab) lub ntsej muag ntawm lub embryo tsim, mus rau lub caudal los yog posterior kawg. https://en.wikipedia.org › wiki › Primitive_streak
Primitive streak - Wikipedia
Daim ntawv Extraembryonic mesoderm nyob qhov twg?
Lub extraembryonic mesoderm ntawm chorion, chorionic villi, thiab lub cev stalk originates nyob rau hauv lub caudal margin ntawm lub primitive streakuas tsim nyob rau hauv 12- mus rau 14-hnub tib neeg thiab macaque embryos. Tsim nyob rau hnub 8 hauv tib neeg. Hnub 12 ntawm tib neeg txoj kev loj hlob, lub extraembryonic mesoderm splits los ua chorionic kab noj hniav.
Extraembryonic daim nyias nyias tsim li cas?
Lwm yamextraembryonic daim nyias nyias tsim los ntawm lub puab cell loj, lub amnion, ces loj hlob tshaj lub tsim embryo (Daim duab 10.4). Lub amniotic kab noj hniav yuav puv nrog amniotic kua. Lub amnion yog ib qho tseem ceeb extraembryonic membrane thoob plaws hauv kev loj hlob.
Extraembryonic ectoderm tuaj qhov twg?
Cov ntaub so ntswg xim ntsuab (cov extraembryonic ectoderm thiab ectoplacental cone (ec)) yog muab los ntawm the trophectoderm. Cov ntaub so ntswg daj yog muab los ntawm cov txheej txheem endoderm thiab epiblast hlwb uas dhau los ntawm cov kab mob, tsim kom muaj qhov tseeb endoderm.
Epiblast ua dab tsi?
Lub epiblast yog muab los ntawm lub cell loj thiab nyob saum lub hypoblast. Cov kab mob epiblast ua rau peb cov kab mob tseem ceeb (ectoderm, qhov tseeb endoderm, thiab mesoderm) thiab mus rau cov extraembryonic mesoderm ntawm lub visceral yolk sac, allantois, thiab amnion.
Pom zoo:
Mesoderm nyob qhov twg?
Mesoderm yog txheej kab mob uas muaj nyob hauv cov tsiaj embryos uas yuav ua rau muaj cov ntaub so ntswg tshwj xeeb. Mesoderm yog ib qho ntawm peb txheej kab mob uas muaj nyob rau hauv cov kab mob triploblastic; nws pom nruab nrab ntawm ectoderm thiab endoderm.
Thaum twg cov kab mob extraembryonic tshwm sim thawj zaug?
-Thawj tshwm sim lig hnub 3 raws li kev txuas ntxiv ntawm hindgut thiab txhim kho ntawm chorion thiab amnion. Lub lim tiam twg ua rau cov kab mob extraembryonic tsim? Lub sijhawm lub lim tiam thib peb, cov kab mob primordial, uas tshwm sim hauv extraembryonic mesoderm ze ntawm lub hauv paus ntawm allantois, ua kom pom tau hauv ob sab ntawm lub hnab yolk (saib daim duab.
Qhov nyiaj ntawm qhov ntswg tuaj qhov twg?
Thaum cov Danes tau kov yeej Ireland nyob rau xyoo pua cuaj, lawv tau suav suav suav "suav qhov ntswg". Cov nqi se ntau dhau tau raug them rau txhua "lub qhov ntswg", yog li ib tus yuav tsum tau them los ntawm lub qhov ntswg.
Mesoderm tuaj qhov twg?
Mesoderm yog ib txheej kab mob txheej kab mob Lub ectoderm yog ib qho ntawm peb txheej txheej kab mob thawj zaug tsim nyob rau hauv thaum ntxov embryonic kev loj hlob. Nws yog txheej txheej sab nraud, thiab yog sab nraud rau mesoderm (cov txheej nruab nrab) thiab endoderm (txheej sab hauv tshaj).
Thaum twg extraembryonic mesoderm tsim?
Lub extraembryonic mesoderm ntawm chorion, chorionic villi, thiab lub cev stalk originates nyob rau hauv lub caudal margin ntawm lub primitive streak primitive streak Lub primitive streak yog a qauv uas tsim nyob rau hauv lub blastula thaum lub sij hawm thaum ntxov ntawm avian, tsiaj reptilian thiab mammalian embryonic txoj kev loj hlob.
