Arthropods (/ˈɑːrθrəpɒd/, los ntawm Ancient Greek ἄρθρον (arthron) 'joint', thiab πούς (pous) 'ko taw' (gen. ποδός)) yog cov tsiaj txhu invertebrate. ib tug exoskeleton, ib tug segmented lub cev, thiab ua ke sib koom appendages.
Dab tsi phylum muaj lub cev pob txha sab hauv?
Ib tug tuaj yeem pom cov kab mob endoskeletons hauv peb phyla thiab ib pawg ntawm cov tsiaj: hauv Chordata, Echinodermata, Porifera thiab Coleoidea. Ib qho endoskeleton tso cai rau lub cev txav mus los thiab muab cov qauv ntawm lub cev thiab cov duab. Qhov tseeb endoskeleton tsim los ntawm cov ntaub so ntswg mesodermal. Cov pob txha zoo li no muaj nyob hauv echinoderms thiab chordates
Yuav tsiaj twg muaj ob txhais ceg?
Muaj ntau dua 800,000 hom npe hauv Phylum Arthropoda, npe los ntawm Greek arthros (=sib koom) thiab poda (=ko taw), suav nrog cov paub arachnids, crustaceans, thiab kab, ua ke nrog cov tswv tsev ntawm cov neeg tsis paub zoo, xws li centipedes, millipedes thiab kab laug sab hiav txwv. Tag nrho cov arthropods muaj kev sib koom ua ke.
Dab tsi phylum yog tsim los ntawm cov kab mob nrog exoskeletons thiab ob txhais ceg?
The phylum Arthropoda muaj ntau haiv neeg ntawm cov tsiaj nrog tawv exoskeletons thiab sib koom ua ke. Ntau hom tsiaj uas paub txog muaj nyob rau hauv phylum Arthropoda- kab, kab laug sab, scorpions, centipedes, thiab millipedes ntawm thaj av; crabs, crayfish, cws, lobsters, thiab barnacles hauv dej (Fig.
Lub phylum twg yog tsim los ntawm cov kab mob uas muaj ib qho exoskeleton ua los ntawm chitin thiab sib koom appendages?
ποδός)) yog cov tsiaj txhu uas tsis muaj zog uas muaj cov kab mob exoskeleton, ib ntu ntawm lub cev, thiab sib koom ua ke appendages. Arthropods tsim lub phylum Arthropoda. Lawv txawv los ntawm lawv cov leeg pob txha thiab cuticle ua los ntawm chitin, feem ntau mineralized nrog calcium carbonate.
