Dab tsi ntawm symmetry phylum Mollusca muaj?
Dab tsi ntawm symmetry phylum Mollusca muaj?

Video: Dab tsi ntawm symmetry phylum Mollusca muaj?

Video: Dab tsi ntawm symmetry phylum Mollusca muaj?
Video: chen vang -phu tshi fab - YouTube 2024, Lub peb hlis ntuj
Anonim

Cov hom symmetry uas mollusks muaj yog ob sab symmetry . Txhais tau tias ob sab yog ntsig txog. Daim duab qhia tau hais tias lub cev nqaij daim tawv, visceral mass thiab mantle.

Ib yam li ntawd ib tug yuav nug, hom ntawm lub cev symmetry ua Mollusca muaj?

Molluscs yog ob sab symmetrical , txawm tias ib txhia muaj thib ob poob qhov symmetry nyob rau hauv ib feem; lawv muaj zoo-tsim excretory, digestive, ua pa thiab circulatory systems. Nyob rau hauv tag nrho molluscs tsuas yog cephalopods, lub circulatory system yog qhib.

Tom qab ntawd, lo lus nug yog, puas mollusks puas muaj Coelom? Muaj ib txheej ntawm cov ntaub so ntswg hu ua mantle ntawm lub plhaub thiab lub cev. Feem ntau mollusks muaj tentacles rau kev pub mis thiab hnov, thiab ntau muaj ib leeg ko taw. Mollusks kuj muaj coelom , ua tiav digestive system, thiab tshwj xeeb hauv nruab nrog cev rau excretion.

Tsuas yog li ntawd, dab tsi phylum yog Mollusca?

Lophotrochozoa

Puas yog mollusks muaj radial symmetry?

Cov tsiaj no yog radially symmetrical , txhais tau tias tag nrho lawv cov appendages emanate tawm sab nraud los ntawm lub hauv paus ntsiab lus. Feem ntau mollusks , ntawm qhov tod tes, nthuav qhia ob tog symmetry . Gastropods pib lub neej nrog ob sab symmetry , tab sis los ntawm tus txheej txheem hu ua "torsion" lawv lub cev ntswj hauv lawv lub plhaub thaum lawv loj tuaj.

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