Annelids muaj lub paj hlwb ua los ntawm ob lub ventral qaum thiab ib qho tseem ceeb ntawm cov hlab ntsha loj ntawm nws qhov chaw sab hauv, uas zoo li lub hlwb thaum ub. … Yog li ntawd, cephalization hauv annelids yog ntau dua hauv cov nematodes lossis hauv flatworms flatworms Cov neeg laus ntau nruab nrab ntawm 0.2 hli (0.0079 hauv) thiab 6 hli (0.24 hauv) ntev. Ib tug neeg laus digeneans yog ib tug poj niam txiv neej, thiab nyob rau hauv ib co hom slender poj niam nyob rau hauv ib tug kaw grooves uas khiav raws lub cev ntawm cov txiv neej, ib feem tawm mus nteg qe. https://en.wikipedia.org › wiki › Flatworm
Flatworm - Wikipedia
Yuav tsiaj twg muaj cephalization?
Peb pawg tsiaj ua kom pom qhov siab ntawm cephalization: vertebrates, arthropods, thiab cephalopod mollusks. Piv txwv ntawm vertebrates muaj xws li tib neeg, nab, thiab noog. Piv txwv ntawm arthropods muaj xws li lobsters, ntsaum, thiab kab laug sab. Piv txwv ntawm cephalopods muaj xws li octopuses, squid, thiab cuttlefish.
Tus yam ntxwv tseem ceeb ntawm phylum Annelida yog dab tsi?
yam ntxwv ntawm Phylum Annelida
- Lawv muaj lub cev ntev thiab segmented.
- Annelids yog ob tog sib luag.
- Lawv yog triploblastic.
- Tsis tas li, lawv nthuav tawm cov kab ke hauv nruab nrog cev, qhia txog kev sib txawv ntawm lub cev.
- Lub cev yog npog nrog daim nyias nyias.
- Lawv yog coelomate.
Puas yog Mollusca muajcephalization?
Ob qho tib si molluscs thiab annelids tej zaum hloov zuj zus los ntawm cov neeg nyob dawb. Ob leeg flatworms thiab molluscs yog triploblastic, ob tog sib luag, thiab cephalized. Tab sis molluscs tau tsim muaj tseeb coelom, ib lub cev sab hauv kab noj hniav uas kaw los ntawm mesodermal daim nyias nyias.
Puas yog annelida ob tog?
Morphology. Annelidstso tawm ob sab symmetrythiab zoo li worm-zoo li hauv tag nrho morphology. Annelids muaj segmented lub cev txoj kev npaj nyob rau hauv thiab sab nraud morphological nta tau rov ua dua nyob rau hauv txhua lub cev ntu. … Lub cev tag nrho tuaj yeem muab faib ua lub taub hau, lub cev, thiab pygidium (los yog tus Tsov tus tw).
