Dab tsi yog qhov txawv ntawm Diffuse thiab Centralized Nervous System

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Dab tsi yog qhov txawv ntawm Diffuse thiab Centralized Nervous System
Dab tsi yog qhov txawv ntawm Diffuse thiab Centralized Nervous System

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Video: Dab tsi yog qhov txawv ntawm Diffuse thiab Centralized Nervous System
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Qhov sib txawv tseem ceeb ntawm qhov sib txawv thiab lub hauv nruab nrab ntawm lub paj hlwb yog tias lub paj hlwb diffuse yog qhov tseem ceeb tshaj plaws ntawm cov paj hlwb uas cov paj hlwb feem ntau faib rau hauv qab sab nraud ntawm lub cev, thaum lub hauv nruab nrab lub paj hlwb yog ib qho. Daim ntawv nyuaj ntawm lub paj hlwb uas muaj ntau cov paj hlwb muaj ntau nyob rau hauv lub hlwb thiab qaum qaum ntawm ib tug kab mob.

Lub paj hlwb yog lub hauv paus tswj hwm thiab kev sib txuas lus hauv lub cev. Diffuse thiab centralized paj hlwb yog ob hom paj hlwb hauv cov tsiaj. Lub paj hlwb diffuse muaj nyob rau hauv cnidarians (sea anemones) thiab ctenophores los yog comb jellies. Lub hauv nruab nrab lub paj hlwb muaj nyob rau hauv vertebrates xws li amphibians, tsiaj reptiles, thiab tsiaj txhu.

Diffuse Nervous System yog dab tsi?

Lub paj hlwb diffuse yog ib hom paj hlwb uas cov paj hlwb sib npaug sib npaug thoob plaws hauv lub cev, feem ntau hauv qab txheej txheej txheej sab nraud. Qhov loj ntawm cov paj hlwb tsis yog qhov tseem ceeb hauv qhov system no. Txawm li cas los xij, muaj ganglia lossis me me ntawm cov neurons. Cnidarians, suav nrog corals, hydras, jellyfish, hiav txwv anemones, hiav txwv cwj mem, hiav txwv nplawm thiab hiav txwv kiv cua, muaj lub paj hlwb. Ntxiv mus, cov tswv cuab ntawm phylum ctenophore muaj lub paj hlwb diffuse. Ctenophores tseem hu ua comb jellies, hiav txwv gooseberries, hiav txwv walnut los yog Venus's girdles. Raws li qhov tseeb, lub paj hlwb diffuse yog ib qho tshwj xeeb ntawm marine invertebrates.

Diffuse vs Centralized Nervous System hauv Tabular Daim Ntawv
Diffuse vs Centralized Nervous System hauv Tabular Daim Ntawv

Daim duab 01: Nruas Systems

Feem ntau cnidarians nyiam hydra muaj paj hlwb. Lub paj hlwb yog ib qho mesh zoo li lub cev ntawm tus kheej thiab cais cov paj hlwb thiab fibers. Hom hydra muaj ob lub vas. Ib qho yog tam sim no nyob rau hauv nruab nrab ntawm lub epidermis thiab musculature, thaum lub thib ob yog nyob rau hauv lub gastrodermis. Kev sib txuas tuaj yeem tshwm sim ntawm ob lub vas ntawm ntau lub ntsiab lus. Cov neurons ib leeg sib cuag tab sis tsis fuse. Yog li ntawd, lawv tsim cov qauv zoo ib yam li synapses ntawm vertebrates. Tsis tas li ntawd, ntau qhov sib txawv tuaj yeem tshwm sim hauv cov hlab ntsha hauv cov hlab ntsha ntawm cov invertebrates.

Dab tsi yog Centralized Nervous System?

Ib lub hauv nruab nrab ntawm lub paj hlwb yog ib qho nyuaj ntawm cov paj hlwb uas muaj cov paj hlwb ntau ntau hauv lub hlwb thiab qaum qaum. Nws tshwm sim feem ntau nyob rau hauv tag nrho cov vertebrates. Nws kuj tuaj yeem pom muaj nyob rau hauv cov tsiaj txhu xws li arthropods, flatworms, annelids, mollusks, thiab cephalopods. Lub hauv paus paj hlwb muaj lub hlwb thiab tus txha caj qaum hauv vertebrates. Raws li nws muab cov ntaub ntawv ntawm tag nrho lub cev thiab ua haujlwm ua haujlwm, nws raug xa mus rau lub hauv paus paj hlwb.

Lub hlwb yog lub cev uas nyuaj tshaj plaws, thiab nws muaj 100 billion neurons. Nws muaj plaub lobes: lub cev, parietal, occipital thiab frontal. Tus txha caj qaum khiav tag nrho ntev ntawm lub nraub qaum thiab nqa cov ntaub ntawv ntawm lub hlwb thiab lub cev. Lub hlwb thiab tus txha caj qaum yog ob qho tib si npog nrog cov ntaub thaiv npog hu ua meninges. Ntxiv mus, lub hauv paus paj hlwb tuaj yeem muab faib ua ob ntu: dawb thiab grey teeb meem. Ob leeg cov ntaub so ntswg tiv thaiv los ntawm glial hlwb. Lub cortex sab nraud ntawm lub hlwb muaj cov teeb meem grey, uas muaj axons thiab oligodendrocytes (glial hlwb). Sab hauv ntawm lub hlwb muaj cov teeb meem dawb, thiab nws muaj feem ntau ntawm cov neurons.

Diffuse thiab Centralized Nervous System - Sib piv ntawm ib sab
Diffuse thiab Centralized Nervous System - Sib piv ntawm ib sab

Daim duab 02: Central Nervous System

Nyob rau hauv cov vertebrate siab dua, muaj nyob ib ncig ntawm 12 khub ntawm cranial qab haus huv uas tshwm sim los ntawm lub hlwb thiab dhau los ntawm lub qhov ntawm lub pob txha taub hau es tsis raws li tus txha caj qaum. Cephalization yog ib qho evolutionary feature nyob rau hauv uas lub qhov ncauj, lub siab lub cev, thiab paj hlwb ganglia ua concentrated nyob rau hauv pem hauv ntej kawg uas yog tsim ib lub taub hau cheeb tsam. Qhov no ua rau muaj kev tsim cov hlwb hauv peb pawg tsiaj, suav nrog arthropods, cephalopods mollusks thiab vertebrates.

Dab tsi zoo sib xws ntawm Diffuse thiab Centralized Nervous System?

  • Diffuse thiab centralized paj hlwb yog ob hom paj hlwb hauv tsiaj.
  • Ob lub paj hlwb muaj cov yam ntxwv ntawm kev sib xyaw ntawm cov paj hlwb
  • Invertebrates tuaj yeem muaj qhov sib txawv ntawm lub paj hlwb lossis lub paj hlwb hauv nruab nrab.
  • Qhov kawg ua haujlwm ntawm ob lub paj hlwb yog tswj thiab tswj lub cev ntawm lub cev.

Qhov txawv ntawm Diffuse thiab Centralized Nervous System yog dab tsi?

Lub paj hlwb diffuse yog daim ntawv tseem ceeb tshaj plaws ntawm lub paj hlwb uas cov paj hlwb raug faib feem ntau hauv qab txheej txheej epidermal nyob rau hauv lub cev, thaum lub hauv nruab nrab lub paj hlwb yog ib qho nyuaj ntawm cov paj hlwb uas muaj coob tus. ntawm paj hlwb yog concentrated nyob rau hauv lub hlwb thiab tus txha caj qaum ntawm ib tug kab mob. Yog li, qhov no yog qhov sib txawv tseem ceeb ntawm diffuse thiab centralized paj hlwb. Tsis tas li ntawd, lub paj hlwb diffuse tshwm sim nyob rau hauv cov tsiaj nrog radial symmetry, thaum lub hauv nruab nrab lub paj hlwb tshwm sim nyob rau hauv cov tsiaj nrog ob sab symmetry.

Cov hauv qab no infographic teev qhov sib txawv ntawm diffuse thiab centralized paj hlwb nyob rau hauv daim ntawv tabular rau ib sab sib piv.

Summary – Diffuse vs Centralized Nervous System

Lub paj hlwb yog qhov tseem ceeb ntawm kev tswj hwm, kev sib koom tes, thiab kev sib txuas lus hauv lub cev. Diffuse thiab centralized paj hlwb yog ob hom paj hlwb pom nyob rau hauv cov tsiaj. Lub paj hlwb diffuse yog ib hom paj hlwb uas cov paj hlwb sib npaug sib npaug thoob plaws hauv lub cev, feem ntau hauv qab txheej txheej epidermal, thaum lub paj hlwb hauv nruab nrab yog ib qho nyuaj ntawm cov paj hlwb uas muaj ntau lub paj hlwb yog concentrated hauv. lub hlwb thiab tus txha caj qaum hauv lub cev. Yog li, qhov no yog qhov sib txawv tseem ceeb ntawm qhov sib txawv thiab qhov nruab nrab ntawm lub paj hlwb.

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