![Dab tsi yog txheej txheem zom zaub mov qub lossis lub plab hu ua? Dab tsi yog txheej txheem zom zaub mov qub lossis lub plab hu ua?](https://i.answers-medical.com/preview/medical-health/13962783-what-is-the-primitive-digestive-tract-or-gut-called-j.webp)
Video: Dab tsi yog txheej txheem zom zaub mov qub lossis lub plab hu ua?
![Video: Dab tsi yog txheej txheem zom zaub mov qub lossis lub plab hu ua? Video: Dab tsi yog txheej txheem zom zaub mov qub lossis lub plab hu ua?](https://i.ytimg.com/vi/dQoUkurokk0/hqdefault.jpg)
2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
Thaum lub sij hawm fetal lub neej, cov primitive plab tau muab faib ua peb ntu: foregut (lub qhov ncauj mus rau duodenum), midgut (duodenum rau txoj hnyuv), thiab hindgut (feem ntau ntawm txoj hnyuv thiab qhov quav). Cov plab thiab txoj hnyuv (muab tau los ntawm plab tsim nyog), txhim kho raws li qhov o ntawm thawj lub plab.
Ua qhov no hauv kev txiav txim siab, yuav ua li cas cov txheej txheem plab zom mov thawj zaug?
Raws li qhov tshwm sim ntawm cephalocaudal thiab sab nraub qaum ntawm lub embryo, ib feem ntawm endoderm-lined yolk sac kab noj hniav tau suav nrog rau hauv lub embryo daim ntawv cov primitive plab . Hauv cephalic thiab caudal qhov chaw ntawm lub embryo, tus txheej txheem plab thaum ub ib lub raj, lub foregut thiab hindgut, feem.
Ib qho ntxiv, dab tsi cais cov kab mob GI sab saud thiab qis? Upper gastrointestinal ib ntsuj av Qhov kev qhia meej meej ntawm sab sauv thiab sab qis yog cov leeg nqaij ntawm duodenum. Cov leeg nqaij tsis txaus ntseeg yog thaj chaw tseem ceeb ntawm lub cev uas qhia pom kev faib tawm ntawm duodenum thiab jejunum, thawj thiab thib ob ntawm txoj hnyuv me, feem.
Tom qab ntawd, ib tus tseem tuaj yeem nug, lub plab embryonic yog dab tsi?
Cov txheej thaum ub plab raj tau muab los ntawm sab nraub qaum ntawm lub hnab yas, uas suav nrog hauv lub cev cev xeeb tub thaum folding ntawm cev xeeb tub thaum lub lim tiam plaub. Lub epithelium ntawm thiab parenchyma ntawm cov qog cuam tshuam nrog txoj hnyuv (piv txwv li, daim siab thiab txiav) tau muab los ntawm endoderm.
Qhov kev txiav txim ntawm GI txoj kab ke yog dab tsi?
Cov GI kab mob yog ib tug series ntawm hollow kabmob koom nyob rau hauv ib tug ntev, twisting raj los ntawm lub qhov ncauj mus rau lub qhov quav. Lub cev hollow uas ua rau GI kab mob yog lub qhov ncauj, esophagus, plab, hnyuv me, plab hnyuv loj, thiab qhov quav. Lub siab, txiav txiav, thiab lub zais zis yog cov khoom nruab nrog cev plab lawv.
Pom zoo:
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Chyme lossis chymus (/ka? M/; los ntawm Greek χ υ Μό ς khymos, 'kua txiv') yog cov kua dej ib nrab ntawm cov zaub mov zom zom uas raug ntiab tawm ntawm lub plab, los ntawm lub pyloric valve, rau hauv duodenum ( pib ntawm txoj hnyuv me)
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Cov plab hauv plab yog qhov tsis txaus ntseeg hauv lub plab uas qhia txog kev nkag mus rau 3-5 tubular zoo li lub plab hnyuv. Lawv tob hauv cov pylorus dua li lawv nyob hauv lwm qhov ntawm lub plab. Tib neeg lub plab muaj ob peb plhom ntawm cov qhov no uas teev rau saum npoo ntawm daim tawv nqaij epithelium
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Cov ntsiab lus hauv cov txheej txheem no (8) ua kom cov vascular endothelium. vasodilation. ua npaws ntau lawm. tsiv teb tsaws ntawm cov kab mob tiv thaiv kab mob hlwb mus rau thaj chaw. ua kom thiab cytokine tso tawm los ntawm neutrophils. phagocytosis thiab cov hau kev ntawm kev puas tsuaj. tus mob theem teb. clotting cascade