Qhov sib txawv tseem ceeb ntawm nematodes thiab annelids yog cov nematodes yog cov kab mob roundworms uas tsis segmented thaum annelids yog segmented worms tiag. Lub xub ntiag thiab tsis muaj qhov tseeb coelom yog lwm qhov sib txawv ntawm nematodes thiab annelids. Nematodes muaj ib tug pseudocoelom thaum annelids muaj ib tug tiag tiag coelom.
Ob leeg nematodes thiab annelids yog invertebrates nrog elongated lub cev, thiab lawv prominently feature ntawm worms.
Nematodes yog dab tsi?
Nematodes yog ib hom kab cab uas yog cylindrical thiab tsis segmented. Lawv kuj hu ua roundworms. Lawv yog cov tswv cuab ntawm phylum nematoda ntawm lub nceeg vaj animalia. Muaj txog ib lab hom nematode raws li qee qhov kev kwv yees. Feem ntau ntawm cov nematodes (16,000 hom) yog cov kab mob cab, thiab qhov no yog vim li cas rau qhov tsis zoo ntawm cov kab mob roundworms. Cov tswv cuab loj tshaj plaws ntawm phylum yog txog tsib cm ntev, tab sis lawv qhov nruab nrab ntev yog li 2.5 hli. Cov hom me tshaj plaws tsis tuaj yeem pom tshwj tsis yog pom los ntawm lub tshuab kuaj kab mob.
Daim duab 01: Nematodes
Nematodes muaj lub plab zom mov tiav nrog lub qhov ncauj ntawm ib kawg ntawm lub cev thiab lub qhov quav ntawm qhov kawg. Lub qhov ncauj yog nruab nrog peb daim di ncauj, tab sis qee zaum tus naj npawb ntawm daim di ncauj tuaj yeem yog rau thiab. Txawm hais tias lawv tsis muaj tseeb segmented worms, lawv muaj tapered thiab nqaim anterior thiab posterior kawg. Txawm li cas los xij, muaj ob peb ornaments viz. Warts, bristles, rings, thiab lwm yam khoom me me. Lub cev kab noj hniav ntawm nematodes yog pseudocoelom, uas yog lined nrog mesodermal thiab endodermal cell txheej. Cov kab mob cab tshwj xeeb tau tsim qee cov paj hlwb kom paub qhov chaw nyob ib puag ncig lawv.
Annelids yog dab tsi?
Annelids yog ib lub phylum loj uas muaj segmented worms, ragworms, earthworms, thiab nuisance leeches. Tam sim no muaj ntau tshaj li 17,000 hom tsiaj ntawm annelids. Feem ntau, lawv nyob hauv dej tshiab los yog dej ntsev thiab nyob ib puag ncig ntawm thaj chaw ntub dej. Lub cev ntawm annelid yog elongated, tab sis segmented externally los ntawm lub nplhaib zoo li constrictions. Cov kev txwv no yog hu ua annuli, thiab lawv nyob hauv segmented lossis partitioned ntawm septa ntawm tib qhov chaw xws li annuli. Lawv segmentation tuaj yeem suav tias yog thawj lub cim ntawm kev sib txawv ntawm lub cev hauv cov haujlwm sib txawv. Annelids zais lawv cov cuticle los ntawm lawv cov tawv nqaij hlwb, thiab cov cuticle muaj collagen, tab sis nws tsis nyuaj li collagen pom nyob rau hauv ntau lwm invertebrates.
Daim duab 02: Annelids
Ntau tus kws tshawb fawb ntseeg tias cov tshuaj annelids muaj capillaries thauj cov ntshav los ntawm lub cev thiab lawv muaj lub kaw lus kaw. Lawv feem ntau tsis moult lawv cov cuticle, tab sis qee hom tawv nqaij (xws li: leeches) lossis puab tsaig (piv txwv li: polychaetes). Lawv lub cev kab noj hniav yog coelom, tab sis qee hom annelid tsis muaj coelom; ib txhia kuj muaj nyob rau hauv ib qho chaw me me heev. Lawv qhov tseeb coelom yog lined los ntawm cov ntaub so ntswg mesodermal. Qhov no yog thawj qhov piv txwv nyob rau hauv evolutionary sequence qhov twg muaj tseeb lub cev coelom pom. Lub xub ntiag ntawm parapodia nyob rau hauv annelids yog ib qho zoo heev hloov mus rau hauv ib puag ncig.
Dab tsi yog qhov zoo sib xws ntawm Nematodes thiab Annelids?
- Nematodes thiab Annelids yog worms.
- Lawv muaj lub luag haujlwm rau tib neeg cov kab mob.
- Ob leeg yog tsiaj ntawm Kingdom Animalia.
Qhov txawv ntawm Nematodes thiab Annelids yog dab tsi?
Qhov sib txawv tseem ceeb ntawm nematodes thiab annelids nyob hauv segmentation thiab coelom. Nematodes 'lub cev tsis segmented thaum annelids muaj segmented lub cev. annelids muaj ib tug tiag tiag coelom whereas nematodes muaj ib tug pseudocoelom. Tsis tas li ntawd, nematodes muaj lub cev me me piv rau annelids. Lawv kuj muaj tapered kawg, tsis zoo li annelids.
Feem ntau ntawm cov nematodes yog kab mob thaum feem ntau ntawm cov annelids tsis parasitic. Ntxiv mus, nematodes tsis muaj parapodia thiab tsuas muaj cov leeg ntev. Lawv kuj tsis muaj setae lossis me ntsis plaub hau. Annelids muaj parapodia thiab muaj ob leeg longitudinal thiab ncig. Lawv kuj muaj setae lossis cov plaub hau me me ntawm txhua ntu.
Summary – Nematodes vs Annelids
Phylum Nematoda thiab Annelida yog ob lub phyla ntawm lub nceeg vaj Animalia. Nematodes yog cylindrical thiab roundworms nrog un-segmented lub cev. Annelids yog segmented worms. Lawv muaj qhov tseeb coelom, tsis zoo li nematodes uas muaj pseudocoelom. Qhov no yog qhov txawv ntawm Nematodes thiab Annelids.
