Cov coelom ntawm feem ntau cov protostomes yog tsim los ntawm cov txheej txheem hu ua schizocoely, txhais tau hais tias thaum lub sij hawm kev loj hlob, ib qho khoom loj ntawm mesoderm splits sib nrug thiab tsim lub hollow qhib ntawm lub coelom. … Cov hnab no thaum kawg fuse los ua mesoderm, uas tom qab ntawd ua rau cov coelom.
Puas protostomes feem ntau muaj coelom?
Protostomes yog ob tog sib luag, muaj peb txheej kab mob, theem ntawm lub koom haum, lub raj-hauv-ib-tube lub cev npaj, thiab muaj tseeb coelom. … Coelomic kua tiv thaiv kab mob hauv nruab nrog cev thiab tseem ua hauj lwm raws li ib tug hydrostatic skeleton. Protostomes tsim lawv embryo los ntawm kauv cleavage.
hom coelom ua protostomes muaj dab tsi?
Nyob rau hauv protostomes, cov coelom tsim thaum mesoderm splits los ntawm cov txheej txheem ntawm schizocoely, thaum nyob rau hauv deuterostomes, cov coelom tsim thaum mesoderm pinches tawm los ntawm cov txheej txheem ntawm enterocoely. Protostomes tau txais kab laug cleavage, hos deuterostomes undergo radial cleavage.
Puas protostomes muaj coelom?
Cov coelom ntawm feem ntau protostomes yog tsim los ntawm cov txheej txheem hu ua schizocoely. Lub mesoderm nyob rau hauv cov kab mob no feem ntau yog cov khoom ntawm blastomeres tshwj xeeb, uas tsiv mus rau sab hauv ntawm lub embryo thiab tsim ob pawg ntawm cov ntaub so ntswg mesodermal.
Qhov twg hauv qab no yog piv txwv ntawm Protostome?
Qee yam piv txwv ntawm protostomes yog arthropods,molluscs, thiab tardigrades. Ua ke nrog Deuterostomia thiab Xenacoelomorpha, cov no tsim cov clade Bilateria, tsiaj nrog ob sab symmetry thiab peb txheej kab mob.
