Lawv txav los ntawm dav hlau propulsion; dej nyob rau hauv lub mantle kab noj hniav yog squirted sai heev los ntawm ib tug siphon. Cov ko taw tau hloov zuj zus mus rau hauv tentacles ncig lub taub hau. Cephalopods muaj lub beak zoo li lub cev muaj zog los rhuav tshem cov tsiaj txhu.
Pob bivalves siv hom dav hlau propulsion rau kev txav?
Cov pas dej da dej nto moo tshaj plaws yog scallops, uas tau hloov zuj zus mus siv dav hlau propulsion, zoo ib yam li lawv cov txheeb ze ze ntawm cephalopod. Tab sis tsis zoo li cov cephalopods, scallops hloov zuj zus los siv lawv cov hinged plhaub los pab cov txheej txheem no!
gastropods thiab bivalves txawv li cas?
Piv Bivalves thiab Gastropods
Bivalve plhaub yog ua los ntawm ob daim txuas ntawm pob khawm. Yog li, yog tias koj pom lub plhaub nrog pob khawm, nws yuav tsum yog bivalve. Gastropods yog ib thooj thiab feem ntau muaj kauv ntawm qhov kawg.
Yuav ua li cas gastropods dhau torsion thaum lawv loj hlob?
Gastropods tau txais kev sib tw thaum lawv loj hlob. … Thaum lub sij hawm torsion, lub visceral loj twist ib ncig ntawm 180 degrees. Qhov kev sib tw no ua rau lub cev nqaij daim tawv, gills, thiab lub qhov quav mus rau pem hauv ntej ntawm tus tsiaj. Vim yog torsion, gastropods tuaj yeem thim lawv lub taub hau rau hauv nwsmantle thaum raug hem.
bivalves txav li cas?
bivalves txav li cas? Lawv siv ko taw faus lawv tus kheej hauv av nkos lossis xuab zeb, lossis kom deb ntawm cov tsiaj nyeg. … Lawv hu ua bivalves vim lawv lub plhaub muaj ob seem uas yoghu ua li qub.
