Qhov txawv ntawm Notochord thiab Nerve Cord

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Qhov txawv ntawm Notochord thiab Nerve Cord
Qhov txawv ntawm Notochord thiab Nerve Cord

Video: Qhov txawv ntawm Notochord thiab Nerve Cord

Video: Qhov txawv ntawm Notochord thiab Nerve Cord
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Qhov Tseem Ceeb Qhov txawv - Notochord vs Nerve Cord

Chordates yog cov kab mob tsim thiab qib siab nrog cov txheej txheem ntawm tes thiab cov txheej txheem metabolic. Lawv muaj cov yam ntxwv tshwj xeeb uas paub qhov txawv ntawm lwm yam kab mob. Cov yam ntxwv tshwj xeeb no feem ntau suav nrog lub xub ntiag ntawm ib qho notochord thiab cov hlab ntsha. Lub notochord thiab paj hlwb chord koom nrog muab cov haujlwm sib txawv. Ob qho qauv txuas ntawm lub caj dab mus rau tus Tsov tus tw hauv thaj tsam dorsal ntawm lub cev. Lub notochord koom nrog lub cev pob txha uas muab txuas rau cov leeg pob txha thaum lub paj hlwb feem ntau koom nrog hauv nruab nrab paj hlwb. Qhov no yog qhov sib txawv tseem ceeb ntawm notochord thiab paj qaum.

Notochord yog dab tsi?

Notochord tuaj yeem txhais tau tias yog tus pas nrig ntev nrog kev hloov pauv siab uas feem ntau muab kev txhawb nqa rau lub cev. Hauv chordates, lub luag haujlwm tseem ceeb ntawm lub notochord yog muab axial yooj thiab kev txhawb nqa los ntawm kev muab cov chaw rau cov leeg pob txha txuas. Thaum lub sij hawm embryonic txoj kev loj hlob, kev loj hlob ntawm lub notochord tshwm sim ib txhij.

Lub pob txha txha caj qaum ua si ntau lub luag haujlwm tseem ceeb. Lub notochord pab lub elongation ntawm lub embryo thaum lub sij hawm embryo txoj kev loj hlob. Nws yog lub hauv paus ntawm midline signals uas ua rau cov ntaub so ntswg nyob ib puag ncig. Thiab nws kuj ua haujlwm raws li lub cev pob txha tseem ceeb thaum lub sij hawm kev loj hlob ntawm embryonic.

Qhov txawv ntawm Notochord thiab Nerve Cord
Qhov txawv ntawm Notochord thiab Nerve Cord

Daim duab 01: Notochord

Nyob rau theem ntawm gastrulation, kev loj hlob ntawm lub notochord pib qhov twg nws loj hlob nrog rau kev tsim ntawm neural phaj. Lub notochord yog muab los ntawm cov hlwb ntawm mesoderm. Yog li ntawd, nws tshwm sim raws li ib tug cartilaginous qauv. Los ntawm cov theem kev loj hlob, lub notochord txhim kho mus tas li rau hauv kab vertebral ntawm cov neeg laus. Lub notochord yog suav tias yog ib qho tseem ceeb qauv txij li thaum nws nyob ib puag ncig thiab tiv thaiv cov hlab ntsha. Qhov txuas ntxiv ntawm lub notochord tshwm sim los ntawm lub taub hau mus rau tus Tsov tus tw.

Nerve Cord yog dab tsi?

Los ntawm nws cov ntsiab lus, cov hlab ntsha yog cov kua dej uas muaj cov kab mob, uas yog cov hlab ntsha ntawm cov hlab ntsha. Nws yog ib tug yam ntxwv feature ntawm chordates. Cov hlab ntsha ib txwm tsim nyob rau hauv lub hlwb thiab qaum qaum ntawm cov kab mob vertebrate. Hauv invertebrates, cov hlab ntsha tsuas muaj nyob hauv qee qhov phyla xwb.

Cov hlab ntsha yog ib qho tseem ceeb ntawm cov hlab ntsha hauv nruab nrab. Nws yog tam sim no raws li ib pob paj ntawm paj fibers nyob rau hauv ib tug transverse dav hlau nrog rau kev hwm rau lub cev lub longitudinal axis. Tab sis cov qauv no me ntsis deviates hauv chordates. Cov hlab ntsha yog hollow thiab tubular uas txuas rau saum lub notochord thiab lub plab zom mov dorsally. Nyob rau hauv cov ntsiab lus ntawm invertebrates, lub paj qaum yog tam sim no raws li ib tug khoom ob raw cov hlab ntsha uas yog tam sim no ventrally. Lwm qhov sib txawv ntawm chordate thiab tsis-vertebrate paj qaum yog tias chordate paj qaum yog tsim los ua ib qho invagination uas tshwm sim thaum lub sij hawm embryonic txoj kev loj hlob qhov twg invertebrate, paj qaum tsis mus raws li txoj kev loj hlob.

Qhov txawv ntawm Notochord thiab Nerve Cord
Qhov txawv ntawm Notochord thiab Nerve Cord

Daim duab 02: Nerve Cord

Yog li ntawd, cov hlab ntsha tuaj yeem muab faib ua ob ntu, lub hlab ntsha ventral thiab dorsal paj qaum. Lub ventral paj qaum uas khiav ventrally hauv qab lub plab zom mov txuas mus rau lub paj hlwb ganglia. Cov hlab ntsha zoo li no muaj nyob hauv phyla xws li nematodes, annelids thiab arthropods nrog rau cov tsiaj xws li roundworms, earthworms thiab kab ntsig. Lub dorsal paj qaum yog ib tug yam ntxwv embryonic feature ntawm chordates. Txoj kev loj hlob ntawm chordate dorsal paj qaum qaum pib los ntawm lig ntawm dorsal ectoderm qhov twg nws invaginates los ua ib tug dej-filled hollow raj.

Dab tsi zoo sib xws ntawm Notochord thiab Nerve Cord?

  • Ob lub notochord thiab paj qaum yog cov pas nrig zoo li cov qauv uas txuas ntawm lub taub hau (caj dab) mus rau tus Tsov tus tw.
  • Ob lub notochord thiab paj qaum muaj nyob rau hauv lub dorsal cheeb tsam ntawm lub cev.
  • Ob lub notochord thiab paj qaum yog cov yam ntxwv ntawm chordates.

Qhov txawv ntawm Notochord thiab Nerve Cord yog dab tsi?

Notochord vs Nerve Cord

Tus notochord yog tus pas nrig ntev nrog kev hloov pauv siab uas feem ntau ua haujlwm los txhawb lub cev. Nerve cord yog ib txheej ntawm cov hlab ntsha uas txuas rau tag nrho qhov ntev ntawm lub cev lub cev.
tshwm sim
Notochord tuaj yeem pom hauv chordates. Nerve cord muaj nyob rau hauv ob qho tib si vertebrates thiab invertebrates.
qauv
Lub notochord yog tus pas nrig zoo li tus qauv uas yog tsim los ntawm cov hlwb ntawm mesoderm. Nerve cord yog ib txoj hlua uas tsim los ntawm ganglia.
keeb kwm
Notochord originates los ntawm mesoderm. Nerve cord originates from ectoderm.

Summary – Notochord vs Nerve Cord

Lub notochord yog ib tug pas nrig longitudinal tam sim no nyob rau hauv chordates. Lub luag haujlwm tseem ceeb ntawm lub notochord yog muab axial yooj thiab kev txhawb nqa los ntawm kev muab cov chaw rau cov leeg pob txha txuas. Thaum lub sij hawm embryonic txoj kev loj hlob, kev loj hlob ntawm lub notochord tshwm sim ib txhij. Lub notochord pab lub elongation ntawm lub embryo thaum lub sij hawm embryo txoj kev loj hlob. Lub notochord yog tsim los ntawm mesodermic hlwb. Cov hlab ntsha yog ib txheej ntawm cov hlab ntsha uas txuas mus rau tag nrho qhov ntev ntawm lub cev. Nws tuaj yeem muab faib ua ob pawg; dorsal paj qaum thiab ventral paj qaum. Lub ventral paj qaum uas khiav ventrally hauv qab lub plab zom mov txuas mus rau lub paj hlwb ganglia. Lub dorsal paj qaum yog hollow thiab tubular uas txuas rau saum lub notochord thiab lub plab zom mov dorsally. Ob qho tib si notochord thiab paj qaum yog cov yam ntxwv ntawm chordates. Qhov no yog qhov txawv ntawm notochord thiab paj qaum.

Download PDF of Notochord vs Nerve Cord

Koj tuaj yeem rub tawm PDF version ntawm kab lus no thiab siv nws rau offline hom phiaj raws li daim ntawv ceeb toom. Thov rub tawm PDF version ntawm no: Qhov txawv ntawm Notochord thiab Nerve Cord

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