Video: Cov kab mob dab tsi ua rau cov nqaij du?
2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
Cov nqaij ntshiv nyob rau hauv cov phab ntsa ntawm lub plab derivatives yog muab los ntawm splanchnic txheej ntawm lateral phaj mesoderm uas nyob ib puag ncig cov qauv no. Tsuas yog cov leeg sphincter thiab dilator ntawm cov menyuam kawm ntawv thiab cov leeg nqaij hauv cov qog mammary thiab hws yog muab los ntawm ectoderm.
Ib yam nkaus, txheej txheej kab mob twg ua rau lub paj hlwb puas tsuaj?
ectoderm
Qhov thib ob, cov txheej txheem kab mob ua rau muaj dab tsi? A kab mob txheej yog ib pawg ntawm cov hlwb hauv ib lub embryo uas cuam tshuam nrog ib leeg thaum lub embryo tsim thiab pab tsim txhua yam kabmob thiab cov ntaub so ntswg. Txhua tus tsiaj, tshwj tsis yog kab laug sab, tsim ob lossis peb cov kab mob . Cov cov kab mob txhim kho ntxov nyob rau hauv embryonic lub neej, los ntawm cov txheej txheem ntawm gastrulation.
Ib yam li ntawd, tib neeg nug, uas cov kab mob txheej twg ua rau cov ntaub so ntswg epithelial?
Cov ntaub so ntswg epithelial muab los ntawm ectoderm feem ntau yog squamous epithelium; cov ntaub so ntswg epithelial muab los ntawm endoderm Qhov tseem ceeb yog glandular epithelium. Muaj ntau yam lub cev cov ntaub so ntswg tau los ntawm txheej txheej thib peb lossis theem nrab hu ua mesoderm.
Cov kab mob twg yog lub hauv paus chiv keeb ntawm cov leeg nqaij pob txha pob txha thiab cov leeg mob plawv?
Mesoderm
Pom zoo:
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