By kawg ntawm lub lim tiam 5th, 42 txog 44 khub ntawm somites raug tsim, pw ntawm ob sab ntawm cov hlab ntsha neural. Thawj occipital thiab kawg 5 - 7 coccygeal somites ploj. Cov seem no pab txhawb txoj kev loj hlob ntawm axial skeleton, pob txha taub hau thiab vertebral kem thiab cov leeg nqaij.
Txoj hmoo ntawm Somites yog dab tsi?
Tus somites nws thiaj li hloov mus rau hauv sclerotome (mob pob txha), syndotome (tendons), myotome (skeletal leeg), dermatome (dermis), thiab cov hlwb endothelial, txhua qhov sib xws rau thaj tsam sib txawv. nyob rau hauv lub somite nws tus kheej.
Thaum twg cov somites tshwm sim thawj zaug?
Nyob rau hauv tib neeg embryo nws tshwm sim nyob rau hauv lub lim tiam thib peb ntawm embryogenesis. Nws yog tsim thaum ib tug dermamyotome (qhov seem ntawm cov somite sab laug thaum lub sclerotome migrates), sib cais los tsim cov dermatome thiab cov myotome.
Dab tsi tshwm sim thaum Somitogenesis?
Somitogenesis yog cov txheej txheem uas tsim cov somites. Somites yog ob tog sib txuas ua ke ntawm paraxial mesoderm uas tsim raws lub anterior-posterior axis ntawm kev loj hlob embryo nyob rau hauv segmented tsiaj. Hauv vertebrates, somites muab nce rau pob txha pob txha, pob txha mos, tendons, endothelium, thiab dermis
Somites hauv me nyuam qaib yog dab tsi?
Somites yog epithelial blocks ntawm paraxial mesoderm uas txhais cov vertebrate embryonic ntu. Lawv yog lub luag hauj lwm rau imposing tus qauv metameric pom nyob rau hauv ntau cov ntaub so ntswg ntawm cov neeg laus xws li cov vertebrae, thiab lawv muab nce mus rau feem ntau ntawm cov axial skeleton thiab skeletal leeg ntawm lub cev.
