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Video: Puas yog sharks muaj Dermatocranium?
![Video: Puas yog sharks muaj Dermatocranium? Video: Puas yog sharks muaj Dermatocranium?](https://i.ytimg.com/vi/DIRv1Hlg8Hg/hqdefault.jpg)
2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
QHOV TSEEB NTAWM VERTEBRATE SKULL. Lub neurocranium yog ib feem ntawm pob txha taub hau uas tiv thaiv lub hlwb thiab qee yam kev nkag siab. Hauv Elasmobranchs ( ntses thiab duab hluav taws xob) nws tau tsim los ntawm cov pob txha mos (chondrocranium), tab sis feem ntau lwm cov pob txha, pob txha mos tau hloov los ntawm pob txha (endochondral lossis hloov pob txha).
Raws li txoj cai, dab tsi ntawm Shark's Chondrocranium feem ntau tom qab?
Qhov me dua, ua ntej ob yog endolymphatic foramina, thiab tom qab khub yog perilymphatic foramina. Lub hyomandibular foramen pierces lub chondrocranium ntawm anteroventral ib feem ntawm thaj av otic. Cov cheeb tsam occipital ua rau tom qab ib feem ntawm chondrocranium.
Kuj Paub, lub npe ntawm pob txha mos uas tsim lub puab tsaig sab sauv hauv sharks yog dab tsi? Hauv ntses thiab rays, lub lub puab tsaig sab sauv (tus palatoquadrate pob txha mos ) tsis yog fused rau chondrocranium, tab sis theej articulates nrog nws. Kev tsim sab nraub qaum yog kho kom haum xeeb los ntawm hyomandibula, lub hauv paus ntawm thawj lub xub pwg pos posterior rau puab tsaig , uas txuas cov puab tsaig ua ke nrog chondrocranium.
Raws li, Neurocranium thiab Dermatocranium yog dab tsi?
Lub Vertebrate Skull muaj xws li: Lub neurocranium / chondrocranium suav nrog lub thawv uas kaw lub hlwb thiab cov tshuaj ntsiav nyob ib puag ncig lub cev nkag siab. Nws tiv thaiv lub hlwb. Lub splanchnocranium yog qhov visceral ntawm pob txha taub hau uas txhawb nqa cov gills thiab pab txhawb rau lub puab tsaig.
Hom kev tshem tawm lub puab tsaig nyob hauv hom tsiaj twg?
Craniostylic lub puab tsaig ncua : Cov tsiaj txhu tsuas muaj ib tus pob txha ua ke, kho hniav, nyob qis dua puab tsaig . Cov pob txha articular thiab quadrate yog puab tsaig pob qij txha nyob rau hauv feem ntau vertebrates tab sis yog tsiv mus rau pob ntseg nyob rau hauv cov tsiaj txhu . Tag nrho sab sauv puab tsaig yog muab tso rau hauv lub baincase thiab lub puab tsaig ncua yog craniostylic.
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