2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
In the mesoderm txheej yog cov yolk sac blood islands blood islands Blood islands yog structures nyob ib ncig ntawm lub embryo tsim uas ua rau ntau qhov sib txawv ntawm cov hlab ntsha.. Ntshav cov Islands tuaj tshwm rau sab nraud rau kev loj hlob embryo nyob rau hauv lub plab vesicle, allantois, txuas stalk thiab chorion. https://en.wikipedia.org › wiki › Blood_islands
Ntshav Islands - Wikipedia
uas cim qhov chaw ntawm thawj embryonic hematopoiesis thiab vasculogenesis. Los ntawm 8 hnub ntawm txoj kev loj hlob, lub vitelline ncig yog tsim, txuas lub yolksac thiab lub embryonic ncig.
Dab tsi yog qhov ua haujlwm ntawm 4 extraembryonic membranes?
Muaj plaub qhov ntxiv-embryonic daim nyias nyias feem ntau pom hauv VERTEBRATES, xws li REPTILES; HUAB TAIS; thiab MAMMALS. Lawv yog YOLK SAC, ALLANTOIS, AMNION, thiab CHORION. Cov membranes no muab kev tiv thaiv thiab txhais tau tias thauj cov as-ham thiab pov tseg.
Yuav ua li cas hauv qab no yog thawj cov kab mob extraembryonic tshwm sim?
Yolk Sac: Thawj cov kab mob extraembryonic rau daim ntawv yog lub hnab yolk. Raws li lub cev folds undercut lub embryo, lub splanchnopleure (splanchnic mesoderm + endoderm) nqaim heev los tsim lub yolk stalk: ib qho kev sib txuas ntawm lub plab thiab lub qe. Lub hnab yolk tsim raws li lub splanchnopleure nyob ib ncig ntawm lub yolk.
Ua cas extraembryonicmembrane ua qhov chaw ntawm cov ntshav tsim thaum ntxov?
Raws li lub limtiam zuj zus, cov xov tooj ntawm tes sab hauv tshem tawm nws tus kheej los ntawm trophoblast thiab dhau los ua cov embryonic disk, thiab ob daim ntawv extraembryonic daim nyias nyias (Fig. 8.4a). Lub yolksac yog thawj qhov chaw ntawm cov qe ntshav tsim. Lub amniotic kab noj hniav nyob ib ncig ntawm lub embryo (thiab tom qab ntawd tus me nyuam hauv plab) thaum nws loj tuaj.
Dab tsi yog cov kab mob txheej txheem ntawm plaub lub extraembryonic membrane?
Txhua tus amniotes muaj plaub yam hauv qab no: cov amnion, chorion, yolk sac, thiab allantois (Fig. 1C). Zoo li cov ntaub so ntswg intraembryonic, cov ntaub so ntswg extraembryonic yog tsim los ntawm cov hlwb uas sawv cev rau peb txheej kab mob: ectoderm, mesoderm, thiab endoderm.
Pom zoo:
Nyob rau hauv cov ntaub so ntswg hexokinase tam sim no?
Hexokinase IV muaj nyob hauv lub siab, pancreas, hypothalamus, txoj hnyuv me, thiab tej zaum qee lwm cov hlwb neuroendocrine, thiab ua lub luag haujlwm tseem ceeb hauv kev tswj cov carbohydrate metabolism. hexokinase nyob qhov twg hauv lub cev?
Dab tsi yog peb cov ntaub qhwv cov ntaub so ntswg hauv cov leeg?
Cov ntaub so ntswg interstitial ntawm cov leeg yog subdivided rau hauv epimysium epimysium Lub epimysium yog cov ntaub so ntswg ntom ntom uas nyob ib puag ncig tag nrho cov leeg nqaij. Lub epimysium feem ntau muaj ntau pob (fascicles) ntawm cov leeg nqaij.
Dab tsi yog cov kab mob photosynthetic pom nyob rau hauv cov ntaub so ntswg ntawm coral?
Feem ntau cov pob zeb tsim cov pob zeb muaj cov photosynthetic algae, hu ua zooxanthellae, uas nyob hauv lawv cov ntaub so ntswg. Corals thiab algae muaj kev sib raug zoo. Lub coral muab cov algae nrog kev tiv thaiv ib puag ncig thiab cov tebchaw uas lawv xav tau rau photosynthesis.
Puas cov ntaub so ntswg epithelial puas muaj cov ntaub so ntswg hauv qab daus?
Ntseeg ntawm Epithelia Epithelial hlwb txuas rau ib hom tshwj xeeb ntawm extracellular matrix hu ua basal lamina basal lamina Lub basal lamina yog txheej ntawm extracellular matrix secreted los ntawm cov epithelial hlwb, ntawm uas lub epithelium zaum.
Nyob rau hauv lub cev ntawm tus txiv neej aqueduct ntawm sylvius tshwm sim nyob rau hauv?
Lub ventricles muaj plaub qhov khoob, cov kua dej puv hauv lub hlwb. … Nws txuas nrog lub paj hlwb aqueduct lossis aqueduct ntawm Sylvius hauv qhov nruab nrab ntawm lub hlwbrau plaub lub ventricle hauv pons thiab medulla. Lub aqueduct ntawm Sylvius nyob qhov twg?
