Cephalopods: Cov Lus Qhia Luv Luv Ntawm Cov Chav Kawm

Cov txheej txheem:

Cephalopods: Cov Lus Qhia Luv Luv Ntawm Cov Chav Kawm
Cephalopods: Cov Lus Qhia Luv Luv Ntawm Cov Chav Kawm

Video: Cephalopods: Cov Lus Qhia Luv Luv Ntawm Cov Chav Kawm

Video: Cephalopods: Cov Lus Qhia Luv Luv Ntawm Cov Chav Kawm
Video: 6 Nqi Lus Qhia Kev Ua neej ( leej twg mloog lub neej yuav zoo tuaj) 2024, Hlis ntuj nqeg
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Muaj ntau ntau ntawm cov tsiaj muaj sia nyob hauv ntiaj chaw uas nyob tsis yog hauv av xwb, tab sis kuj nyob hauv kem dej. Ib ntawm cov neeg sawv cev no yog molluscs.

Cephalopods: Cov lus qhia luv luv ntawm cov chav kawm
Cephalopods: Cov lus qhia luv luv ntawm cov chav kawm

cov yam ntxwv dav dav

Cov chav kawm ntawm cephalopods, lossis Cephalopoda, tseem hu ua gastropods. Nws muaj txog 700 hom tsiaj uas nyob hauv dej lub cev lossis hauv lawv qab. Cov chav kawm tau muab faib ua ob kab me. Thawj tus suav txog kev tu noob ammonites thiab nautilus, uas sawv cev rau tetragill. Qhov thib ob suav nrog cuttlefish, squid thiab octopus. Cov neeg sawv cev no sawv cev rau daim ntawv pov thawj ntawm ob-gill.

Raws li txoj cai, lub cev ntawm mollusks yog tus cwj pwm los ntawm ob tog sib piv. Hauv qhov no, lub taub hau thiab lub cev nyias muaj nyias haujlwm. Lub plhaub yog tam sim no tsuas yog siv cov ntaub ntawv qub, thaum nyob hauv lwm cov neeg sawv cev nws yog coj los ua tus. Los ntawm saum toj no, lub cev tag nrho ntawm mollusk yog them nrog lub npog ntsej muag, uas muaj ib txheej ntawm epithelium thiab cov ntaub so ntswg sib txuas. Qee hom yuav muaj chromatophores, ua tsaug uas lub cev tuaj yeem hloov nws cov xim.

Lub plab zom mov

Lub plab zom mov ntawm cephalopods muaj cov qauv nyuaj. Tab sis lub pharynx tsim nyog tshwj xeeb saib xyuas, uas yog nruab nrog kub lub puab tsaig hauv daim ntawv ntawm lub kaus ncauj. Ntxiv rau, cov kua qaub qaub ncaug uas tso rau hauv pharyngeal kab noj hniav yog cov tshuaj lom heev. Ua tsaug rau lawv, mollusk immobilizes nws prey.

Lub plab yog lub hnab uas ntws ncaj hauv lub plab hnyuv hind. Muaj kuj yog ib lub hnab ntim kua mem hauv cov kua mem tsim tawm, ua tsaug uas tus mollusk muaj peev xwm zais thaum muaj kev phom sij. Lub plab zom mov xaus nrog lub qhov quav.

Excretory thiab ncig tshuab

Cov kab ke mob muaj xws li ob lossis plaub lub raum. Raws li txoj cai, lawv tus lej yog nyob ntawm tus neeg sawv cev. Kev mob ncig yog sawv cev los ntawm lub siab nrog ib lub ventricle thiab ob lub atria. Cov neeg sawv cev ob-gill ntawm atria muaj ob, thiab cov neeg sawv cev plaub-gill muaj plaub.

Cov plab hnyuv siab raum

Cov siab ntsws plab hnyuv siab raum yog sawv cev los ntawm osfadia thiab lub hnab muag. Hauv ob-gill cov neeg sawv cev, hloov ntawm osfadia, muaj olfactory pits, thiab raws li cov khoom ntawm kev pom - lub qhov muag sib txuas, uas zoo li cov qauv ntawm lub qhov muag hauv cov tsiaj.

Tus qau thiab pob txha

Txhua lub cephalopods yog cov kab mob dioecious. Lawv qhov muaj mob yog phev ntaws, uas yog, spermatophores ua raws li cov kab mob hlwb. Kev txhim kho ntawm tus menyuam thiaj li tshwm sim hauv lub qe, uas yog nyob hauv lub mantle kab noj hniav ntawm tus poj niam ua ntej pib daug plaub. Lub cev pob txha ntawm feem ntau cephalopods yog sawv cev los ntawm pob txha taub hau cartilaginous.

Kev tswj hwm leeg

Ib qho tshwj xeeb ntawm molluscs yog lawv txoj kev mob hlwb. Nws yog sawv cev los ntawm lub hlwb. Hauv qhov no, tsiaj qiv lawv tus kheej rau kev cob qhia, muaj lub cim xeeb zoo heev thiab txawm tias nws txawv cov duab geometric.

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