Qhov sib txawv tseem ceeb ntawm dermal thiab endochondral ossification yog qhov dermal ossification yog kev loj hlob ntawm cov pob txha los ntawm fibrous membranes, thaum endochondral ossification yog kev loj hlob ntawm cov pob txha los ntawm hyaline pob txha.
Ossification lossis osteogenesis yog tsim cov pob txha los ntawm osteoblast hlwb. Ossification txawv ntawm calcification. Ossification yuav siv li ntawm rau lub lis piam tom qab fertilization nyob rau hauv ib tug embryo. Dermal ossification yog kev loj hlob ntawm cov pob txha los ntawm fibrous daim nyias nyias, thaum endochondral ossification yog ib hom kev loj hlob ntawm cov pob txha los ntawm hyaline pob txha mos. Dermal ossification yog ib hom intramembranous ossification uas tsim cov pob txha dermal (cov pob txha los yog cov pob txha membrane) tsim cov pob txha pob txha, nrog rau ntau lub pob txha taub hau, puab tsaig, gill npog, xub pwg girdle, fin spines rays, thiab lub plhaub, thaum endochondral. ossification yog txheej txheem tseem ceeb ntawm rudimentary tsim ntawm cov pob txha ntev.
Dermal Ossification yog dab tsi?
Dermal ossification yog ib hom intramembranous ossification uas tsim cov pob txha dermal uas tsim cov pob txha pob txha, nrog rau pob txha taub hau, puab tsaig, gill npog, xub pwg girdle, fin spines rays, thiab lub plhaub. Intramembranous ossification yog cov txheej txheem tseem ceeb thaum lub sij hawm kho cov txheej txheem ntawm cov pob txha pob txha thiab lub rudimentary tsim ntawm cov pob txha pob txha. Cov pob txha mammalian pob txha yog ib qho qauv ossified uas cov pob txha dermal tiaj tus ntawm thaj tsam calvaria craniofacial thiab cov mandible yog tsim los ntawm dermal ossification.
Daim duab 01: Dermal Ossification
Nyob rau hauv dermal ossification, cov pob txha yog tsim los ntawm cov ntaub so ntswg fibrous. Cov pob txha dermal yog tsim nyob rau hauv lub dermis. Lub dermis yog ib txheej ntawm daim tawv nqaij ntawm cov epidermis thiab cov ntaub so ntswg subcutaneous. Nws feem ntau muaj cov ntaub so ntswg tsis sib xws. Kev ua haujlwm ntawm cov pob txha dermal tsim los ntawm dermal ossification yog khaws cia thoob plaws hauv vertebrates. Txawm li cas los xij, muaj qhov sib txawv ntawm cov duab thiab cov pob txha vov tsev hauv pob txha taub hau thiab postcranial. Cov pob txha dermal uas yog tsim los ntawm dermal ossification kuj paub tias muaj kev cuam tshuam rau ecophysiological cuam tshuam xws li cov cua kub hloov ntawm lub cev thiab ib puag ncig ib puag ncig. Qhov no tshwm sim nyob rau hauv crocodiles basking nyob rau hauv lub hnub. Cov pob txha dermal no kuj tsis muaj cov kab mob ua pa acidosis uas pom tseeb hauv khej thiab vaub kib. Cov kev ua haujlwm ntawm ecophysiological ntawm cov pob txha dermal cia siab rau kev teeb tsa ntawm cov hlab ntsha hauv lawv.
Endochondral Ossification yog dab tsi?
Endochondral ossification yog ib qho tseem ceeb heev txheej txheem thaum lub sij hawm rudimentary tsim ntawm cov pob txha ntev. Nws pab txoj kev loj hlob ntawm qhov ntev ntawm cov pob txha thiab ntuj kho ntawm cov pob txha pob txha. Hauv endochondral ossification, cov pob txha yog tsim los ntawm cov pob txha mos hyaline. Hauv cov pob txha ntev, chondrocytes tsim cov qauv ntawm cov pob txha mos hyaline diaphysis. Vim muaj kev loj hlob teeb liab, lub matrix pib calcify. Chondrocytes tuag vim yog calcification vim nws tiv thaiv cov diffusion ntawm cov as-ham rau matrix. Qhov no qhib cov kab noj hniav hauv cov pob txha diaphysis. Cov hlab ntsha ntxeem tau cov kab noj hniav. Lub osteoblast thiab osteoclast hloov kho cov pob txha mos matrix rau hauv pob txha pob txha. Tom qab ntawd, osteoclast rhuav tshem cov pob txha spongy los tsim cov pob txha hauv nruab nrab ntawm lub diaphysis. Ntxiv mus, cov kev sib txuas tsis raug cov ntaub so ntswg uas tau hais plaub hau hu ua periastereum ncig lub pob txha. Qhov no periosteum pab txuas cov pob txha rau cov ntaub so ntswg, cov leeg, thiab ligaments. Raws li cov pob txha mos ntawm cov epiphyses faib, cov pob txha tseem loj hlob thiab elongate.
Daim duab 02: Endochondral Ossification
Nyob rau theem kawg ntawm kev txhim kho pob txha, cov chaw ntawm cov epiphyses (qhov kawg ntawm cov pob txha ntev) pib calcify. Qhov thib ob ossification chaw tsim nyob rau hauv lub epiphyses. Osteoblasts thiab cov hlab ntsha nkag mus rau hauv cov cheeb tsam no thiab hloov cov pob txha hyaline rau hauv pob txha pob txha. Txog thaum hluas, cov pob txha mos hyaline muaj nyob rau ntawm daim phaj epiphyseal. Lub phaj epiphyseal yog thaj tsam ntawm diaphysis thiab epiphysis uas yog lub luag haujlwm rau kev loj hlob ntev.
Dab tsi yog qhov zoo sib xws ntawm Dermal thiab Endochondral Ossification?
- Dermal thiab endochondral ossification yog hom ossification.
- Ob leeg pab pob txha txhim kho.
- Lawv ob leeg siv osteoblast kev ua haujlwm.
- Ob yam txheej txheem tshwm sim hauv vertebrates.
- Cov txheej txheem no kho pob txha pob txha.
Qhov txawv ntawm Dermal thiab Endochondral Ossification yog dab tsi?
Dermal ossification yog ib hom intramembranous ossification uas tsim cov pob txha dermal, thaum endochondral ossification yog cov txheej txheem tseem ceeb ntawm kev tsim cov pob txha ntev. Yog li, qhov no yog qhov sib txawv tseem ceeb ntawm dermal thiab endochondral ossification. Ntxiv mus, nyob rau hauv dermal ossification, cov pob txha yog tsim los ntawm cov ntaub so ntswg fibrous. Nyob rau hauv sib piv, nyob rau hauv endochondral ossification, cov pob txha yog tsim los ntawm hyaline pob txha.
Cov hauv qab no infographic teev qhov sib txawv ntawm dermal thiab endochondral ossification nyob rau hauv daim ntawv tabular.
Summary – Dermal vs Endochondral Ossification
pob txha tsim yog txheej txheem hloov. Thaum lub sij hawm ossification, cov ntaub so ntswg yog hloov los ntawm cov pob txha. Dermal ossification yog ib hom intramembranous ossification uas tsim cov pob txha dermal los ntawm cov ntaub so ntswg, uas tsim cov khoom ntawm cov pob txha pob txha xws li pob txha taub hau. Hauv endochondral ossification, cov pob txha yog tsim los ntawm kev hloov cov pob txha mos hyaline. Yog li, qhov no yog cov ntsiab lus ntawm qhov sib txawv ntawm dermal thiab endochondral ossification.
