Molluscs lossis cov nqaij mos yog ib hom tsiaj uas ntxeev sab hauv. Lawv lub cev muaj cov ntaub so ntswg mos, feem ntau muaj kev tiv thaiv horny formations zoo li lub plhaub. Txog kaum chav kawm ntawm hom Molluscan paub.
Cov Lus Qhia
Kauj ruam 1
Lub cev ntawm lub mollusk tsis faib ua ntu, nws muaj peb ntu: taub hau, ceg thiab pob tw. Qee chav kawm tsis muaj ib qho ntawm chav haujlwm. Piv txwv, lub taub hau ntawm Bivalves yog txo. Nrog kev pab ntawm ob txhais ceg, lub mollusks txav, lub cev ua haujlwm raws li lub chaw thau khoom ntawm cov plab hnyuv sab hauv. Muaj cov khawm tshwj xeeb ntawm lub cev, uas ua cov kab noj hniav cuam tshuam nrog thaj chaw ib puag ncig sab nraud. Cov hlab ntsha ntawm txoj kev ua me nyuam, kev zom plab thiab tso zis tawm hauv lub chaw kab noj hniav.
Kauj ruam 2
Lub paj hlwb ntawm molluscs yog sawv cev los ntawm lub nplhaib periopharyngeal hlab ntsha thiab plaub lub cev. Ob ntawm lawv innervate ob txhais ceg, lwm tus ob - sab hauv plab hnyuv siab raum. Cov neeg sawv cev tsim ntau dua ntawm cov hom muaj cov hlab hlwb, qhov feem ntau tsim tawm uas yog nyob rau ntawm lub taub hau kawg ntawm lub cev. Txoj kev mob ntshav yog feem ntau qhib, uas yog, cov ntshav tau tso tawm ntawm cov hlab ntsha ncaj qha mus rau hauv lub cev kab noj hniav. Tom qab uas nws sau rov qab rau hauv cov hlab thiab mus rau cov kab mob ua pa. Hauv cov ntshav ntawm molluscs muaj ib qho tshuaj uas muab nws cov xim xiav. Tsuas yog Cephalopods muaj cov kab ke kaw ncig.
Kauj ruam 3
Lub plab zom mov kuj tseem qhib, lub qhov quav txuas mus rau hauv qhov kab noj hniav ntawm tus mantle. Hauv caj pas ntawm feem ntau muag-lub cev muaj qhov tshwj xeeb tsim rau kev sib tsoo cov zaub mov. Qhov kev tsim no yog them nrog chitin nyuaj. Cov kab ke uas tsis txawv txav yog lub raum, tus lej uas yuav sib txawv hauv cov chav kawm sib txawv. Lub ntsws ua pa ntawm molluscs yog sawv cev los ntawm gills, thaum av mollusks muaj lub ntsws. Lub ntsws no mob ntawm cov kab noj hniav. Molluscs tuaj yeem yog ob qho dioecious thiab hermaphrodite.
Kauj ruam 4
Molluscs yog ob qhov nqaij thiab tua tsiaj, muaj ntau ntawm cov parasitize ntawm lwm yam tsiaj. Lawv tuaj yeem noj rau ntawm algae, protists, sponges, polyps, ntoo. Muaj txawm molluscs muaj peev xwm ntawm photosynthesis, zoo ib yam li cov nroj tsuag. Lawv pub rau algae, thiab chloroplasts ntawm algae nthuav tawm hauv cov nqaij mos ntawm mollusc.
Kauj ruam 5
Cov chav kawm tshaj plaws ntawm molluscs yog chav Gastropoda, uas tuaj yeem nyob rau yuav luag txhua qhov chaw ib puag ncig. Kev cog qoob loo tshaj plaws yog qwj thiab qwj. Lwm chav kawm ntawm molluscs yog Cephalopods, predatory inhabitants ntawm lub hiav txwv tob. Ceg ceg ntawm cephalopods tau tig mus rau hauv lub tsev pheeb suab nrog tus ntxais, thiab lub taub hau loj heev. Tsis tshua muaj neeg muaj plhaub. Chav Bivalve - sedentary molluscs nrog lub plhaub kaw.
