Kev loj hlob ntawm tus cranium. Lub teca cranium yog tsim ob sab los ntawm cov pob txha frontal thiab parietal, thiab lub cev nqaij daim tawv thiab kho qhov muag ntawm lub cranium. Cov txheej txheem ntawm ossification pib nyob ib ncig ntawm lub lim tiam 10, pib ntawm thaj tsam pem hauv ntej thiab parietal.
ossification pib thiab xaus qhov twg?
pob txha ossification, lossis osteogenesis, yog txheej txheem ntawm pob txha tsim. Cov txheej txheem no pib nruab nrab ntawm lub thib rau thiab xya lub lim tiam ntawm embryonic kev loj hlob thiab txuas ntxiv mus txog hnub nyoog nees nkaum tsib; txawm tias qhov no txawv me ntsis raws li tus neeg.
cranial ossification yog dab tsi?
Kev qeeb membranous cranial ossification yog tsis tshua muaj, genetic thawj pob txha dysplasia yam ntxwv los ntawm qhov tsis tuaj ossification ntawm cov pob txha calvarial thaum yug los thiab tus yam ntxwv ntawm lub ntsej muag dysmorphisms (frontal bossing, hypertelorism, downward-slanting palpebral fissures, proptosis, tiaj qhov ntswg choj, pob ntseg qis, midface retrusion).
cov pob txha cranial nyob qhov twg?
Prenatal loj hlob ntawm cranial puag: • Cov pob txha ntawm pob txha taub hau yog tsim nyob rau hauv the mesenchyme uas yog muab los ntawm mesoderm. Lub cranial vault tsim los ntawm membranous neurocranium. Cov pob txha tiaj tus ntawm lub ntsej muag, feem ntau ntawm cov pob txha cranial, thiab cov clavicles (collarbones) yog tsim los ntawm intramembranous ossification.
txheej txheem ntawm ossification yog dab tsi?
pob txha tsim, tseem hu ua ossification, txheej txheem los ntawmcov pob txha tshiab yog tsim tawm. … Tsis ntev tom qab osteoid tau tso lawm, cov ntsev inorganic tau tso rau hauv nws los ua cov khoom tawv tawv uas pom tau tias yog pob txha pob txha. Cov pob txha pob txha tuag tawm thiab raug hloov los ntawm osteoblasts pawg hauv ossification centres.
