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Video: Cov hlab ntsha puas yog dab tsi?
![Video: Cov hlab ntsha puas yog dab tsi? Video: Cov hlab ntsha puas yog dab tsi?](https://i.ytimg.com/vi/HKm1b57loMU/hqdefault.jpg)
2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
A paj hlwb yog ib pawg ntawm paj hlwb fibers (axons) txuas nuclei ntawm lub hauv paus paj hlwb. Lub ntsiab paj hlwb hauv nruab nrab lub paj hlwb muaj peb hom: koom ua ke cov fibers, cov leeg sib koom ua ke, thiab cov phiaj ua haujlwm.
Hauv qhov no, kab mob hauv lub paj hlwb yog dab tsi?
Hauv lub paj hlwb : Lub vertebrate lawv . … tau koom ua pawg hu ua daim ntawv , los yog fasciculi. Kev nce qib daim ntawv nqa cov kev xav raws tus txha caj qaum mus rau lub hlwb, thiab nqis los daim ntawv nqa lawv los ntawm lub hlwb lossis thaj chaw siab dua hauv cov leeg txha nqaj qaum mus rau thaj tsam qis dua.
Tsis tas li, cov kab mob nyob qhov twg hauv lub paj hlwb? Lawv yog nyob hauv ganglion (hnov) lossis hauv qhov teeb meem grey (lub cev muaj zog). txoj kab - ib pawg ntawm cov fibers hauv CNS. Tus txha nqaj qaum daim ntawv nqa cov ntaub ntawv nce lossis nqis tus txha caj qaum, mus rau lossis los ntawm lub hlwb.
Tsuas yog li ntawd, dab tsi yog tus txha caj qaum?
Cov hlab ntsha . lub cev. Cov hlab ntsha , hauv vertebrates, ib qho ntawm ntau khub ua ke ib leeg paj hlwb uas tshwm sim los ntawm qaum qaum. Hauv tib neeg muaj 31 khub: 8 lub ncauj tsev menyuam, 12 thoracic, 5 lumbar, 5 sacral, thiab 1 coccygeal. Txhua khub txuas tus qaum qaum nrog ib cheeb tsam ntawm lub cev.
Dab tsi yog qhov sib txawv ntawm cov hlab ntsha thiab lub paj hlwb?
Qab haus huv pom hauv peripheral tshee system, thaum neurons pom hauv lub paj hlwb, qaum qaum thiab lub peripheral paj hlwb . A neuron tseem tuaj yeem raug hu ua neurone lossis a paj hlwb cell. 5. Neurons coj paj hlwb impulses, thaum paj hlwb xa cov ntaub ntawv mus rau ntau qhov chaw ntawm lub cev.
Pom zoo:
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Piav qhia: Cov hlab ntshav nqa ntshav nyob hauv siab los ntawm lub plawv mus rau cov kabmob thiab cov nqaij. Lawv cov phab ntsa feem ntau yog tuab dua li cov leeg. Capillaries yog qhov sib txuas ntawm cov hlab ntsha thiab cov leeg thiab me me heev, Cov ntaub so ntswg qee zaum pom tawm thiab rov nco qab los ntawm cov qog ntshav thiab rov qab los rau cov leeg ntshav
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Cov hlab ntsha nqa ntshav tawm ntawm lub plawv; Lub ntsiab hlab ntsha yog aorta. Capillaries nqa ntshav tawm ntawm lub cev thiab pauv cov as-ham, pov tseg, thiab oxygen nrog cov ntaub so ntswg ntawm qib cellular. Cov leeg ntshav yog cov hlab ntshav uas coj cov ntshav rov qab los rau hauv lub plawv thiab tso ntshav tawm ntawm cov kabmob thiab cov ceg
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Muaj plaub hom neuroglia pom nyob hauv nruab nrab lub paj hlwb: Astrocytes - tswj cov ntshav lub hlwb teeb meem thiab khaws cov tshuaj ib puag ncig los ntawm kev siv cov ions rov qab thiab cov tshuaj xa xov mus rau lub cev. Oligodendrocytes - myelinate axons nyob rau hauv lub hauv nruab nrab lub paj hlwb thiab muab tag nrho cov txheej txheem txheej txheem
Dab tsi yog cov hlab ntsha thiab cov hlab ntsha capillaries?
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Cov hlab ntsha nqa ntshav tawm ntawm lub plawv; Lub ntsiab hlab ntsha yog aorta. Capillaries nqa ntshav tawm ntawm lub cev thiab pauv cov as-ham, pov tseg, thiab oxygen nrog cov ntaub so ntswg ntawm qib cellular. Cov leeg ntshav yog cov hlab ntshav uas coj cov ntshav rov qab los rau hauv lub plawv thiab tso ntshav tawm ntawm cov kabmob thiab cov ceg
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Cov hlab ntsha, cov hlab ntsha thiab lymphatic system yog cov hlab ntsha tseem ceeb hauv lub cev circulating system. parasympathetic - lub luag haujlwm rau vasoconstriction