Zoo li lub plhaub, feem ntau mollusks muaj ib tug muscular ko taw rau creeping los yog burrowing. Ib txhia kuj muaj ib lub taub hau nrog lub siab lub cev. Lub cev mos muaj xws li lub ntsws los yog gills rau ua pa, thiab digestive thiab reproductive qhov chaw, tag nrho cov nyob rau hauv ib lub cev zoo li lub cev hu ua mantle.
Kuj tseem paub yog, molluscs puas muaj lub ntsws?
Terrestrial mollusk hom muaj keeb kwm lub ntsws uas nqus oxygen ncaj qha los ntawm huab cua nyob ib puag ncig lawv. Raws li peb tau tham ua ntej, lub gills yog nyob rau hauv cov dej-filled mantle kab noj hniav. Tag nrho mollusks Tsuas yog cov hauv chav kawm Cephalopoda muaj ib qho qhib circulatory system.
Tsis tas li ntawd, qee qhov piv txwv ntawm mollusks yog dab tsi? Cov chav kawm loj ntawm cov mollusks muaj xws li gastropods, bivalves, thiab cephalopods (Daim duab hauv qab).
- Gastropods. Gastropods muaj xws li qwj thiab slugs. Lawv siv lawv ko taw mus nkag.
- Bivalves. Bivalves muaj xws li clams, scallops, oysters, thiab mussels.
- Cephalopods. Cephalopods suav nrog octopus thiab squid.
Ib yam li ntawd, mollusks ua pa li cas?
Dej dej mollusks xws li qwj, clams, thiab octopi feem ntau ua pa siv cov gills hauv lawv lub mantle kab noj hniav. Teb: Av snails thiab slugs ua tsis muaj gills; lawv ua pa siv lub mantle kab noj hniav uas muaj thaj tsam loj uas muaj cov hlab ntsha.
Cov mollusks puas muaj mantle?
Qhov chaw no muaj cov cov mollusc gills, qhov quav, osphradium, nephridiopores, thiab gonopores. Cov mantle kab noj hniav ua hauj lwm raws li ib tug ua pa chamber nyob rau hauv feem ntau molluscs. Hauv qee qhov molluscs tus mantle kab noj hniav yog ib tug brood chamber, thiab nyob rau hauv cephalopods thiab ib co bivalves xws li scallops, nws yog ib tug locomotory organ.
