Hom Coelenterates: general yam ntxwv

Ib qho ntawm thawj pab pawg neeg ntawm multicellular cov tsiaj - ntaus Coelenterates. Qib 7, uas muaj xws li ib tug kev kawm txog tsiaj txhu kawg tshuaj xyuas nyob rau hauv kom meej tag nrho cov yam ntxwv nta ntawm cov amazing creatures. Cia peb ib zaug ntxiv nco qab dab tsi lawv twb.

Ntaus Coelenterates: Biology

Lub npe systematic chav tsev ntawm cov tsiaj yog vim tus qauv ntawm lub tib lub npe. Nws yog hu ua cov nyhuv kab noj hniav, thiab nws cov neeg sawv cev muaj tag nrho cov hom: polyps thiab ua ruaj lub neej, thiab nquag mus jellyfish. Cov yam ntxwv xws li coelenterates raws li yog lub xub ntiag ntawm tshwj xeeb hlwb. Tab sis nyob rau hauv cov kev phem ntawm no hnyav feature ntawm cov qauv ntawm lub cev ntawm cov tsiaj tsis tsim cov ntaub so ntswg.

vaj tse thiab deployments

Cov thawj ntawm cov multicellular tsiaj yuav muaj nyob rau hauv tshiab thiab ntsev dej ntawm txawv climatic ib ncig chaw. Ntaus Coelenterates (7 chav kawm ntawv ntawm ib tug kev lub tsev kawm ntawv nyob rau hauv ib co nthuav dav tshuaj xyuas qhov kev kawm) thiab yog sawv cev los ntawm me me nrws nrog ib lub cheeb ntawm ib tug ob peb millimeters, thiab cov giant jellyfish nrog ntev tentacles mus txog 15 meters. Yog li ntawd, qhov ntawm lub reservoir, lawv nyob qhov twg, muaj peev xwm yuav txawv. Yog li ntawd, me me dej tsis qab ntsev Hydra nyob rau hauv me me pas dej, thiab coral polyps tsim loj heev zos nyob rau hauv lub teb chaws sov seas.

Hom Coelenterates: general yam ntxwv

Lub cev muaj tag nrho cov coelenterates ob peb cell hom, txhua tus uas ua ib txog kev ua, zoo li ib tug nyuaj lub cev txheej txheem tsiaj.

Lub ntsiab yam ntxwv ntawm coelenterates - yog lub xub ntiag ntawm stinging hlwb. Lawv muaj xws li ib tug tshuaj ntsiav nyob rau hauv uas lub twisted xov muaj ib tug ntse kawg. Sab saum toj hlwb yog rhiab cov plaub hau. Thaum nws nphav lub cev ntawm tus neeg, ces spins thiab glares nyob rau ntawm nws lub dag lub zog. Raws li ib tug tshwm sim, nws muaj paraliziruyuschee tej yam. Tom ntej no, siv cov tentacles cov neeg sawv cev ntawm no hom yog muab tso rau txi nyob rau hauv lub plab hnyuv lumen. Thiab tus txheej txheem ntawm kev zom ntawm cov organic teeb meem pib ntawm no. Thiab pab nws nqa tawm lub digestive thiab glandular hlwb.

Coelenterates hom yus los ntawm ib tug high degree ntawm lwm. Zaum pom tau hais tias dej tsis qab ntsev Hydra tau siab rov qab rau hauv lub cev ntawm 1/200 ib feem. Thiab tej zaum qhov no yog vim muaj cov intermediate hlwb. Lawv nquag qhia, muab sawv mus rau tag nrho lwm cov hom. Coelenterates thiab muaj peev xwm ntawm kev sib deev tu tub tu kiv los ntawm tus merger ntawm cov qe thiab cov phev.

Paj hlwb tawg khiav ri niab mus thoob plaws hauv lub cev, nqa tawm lub sib raug zoo nrog cov ib puag ncig thiab ua ke nws mus rau hauv ib tug coherent tag nrho. Yog li ntawd, nws yog heev nthuav yog lub zog ntawm ib qho ntawm cov neeg sawv cev ntawm coelenterates - Hydra. Tsaug rau cov kev ua ntawm daim tawv nqaij thiab mob hlwb yog zoo li ib tug acrobat, tsiv los ntawm lub taub hau mus rau lub ib, ua tam sim no ib tug ntog ua las ncas.

tseem ceeb heev dab coelenterates

Coelenterates hom yog yus muaj los ntawm ib tug ntau physiology tshaj lawv cov predecessors - protozoans thiab lub paj rwb. Txawm hais tias muaj ntau yam tshwm sim. Piv txwv li, nkev pauv yog tseem mus los ntawm qhov npog, thiab tshwj xeeb lug rau qhov no yog tsis tuaj kawm ntawv.

Tsaug rau daim tawv nqaij-mob hlwb, jellyfish muaj peev xwm ntawm lub dav hlau propulsion. Qhov no thiaj li lawv tswb, cov dej yog thawb nrog quab yuam, ua ib tug rov qab laub.

Tag nrho coelenterates yog predatory tsiaj. Nrog tentacles extraction ntawm lub qhov ncauj nkag rau hauv lub cev. Lub efficiency ntawm lub splitting txheej txheem nyob rau tib lub sij hawm muaj pov thawj lub hav zoov ntawm ob hom ntawm kev zom: kab noj hniav thiab cellular.

Rau coelenterates tsiag ntawv los ntawm xub ntiag ntawm tus kab mob cov lus teb rau stimulation - reflexes. Lawv tshwm sim nyob rau hauv cov lus teb rau cov neeg kho tshuab los yog tshuaj los ntawm qhov chaw. Ib tug jellyfish muaj kev kawm tshwj xeeb rhiab muab tswj lub cev tshuav nyiaj li cas, thiab xaav ntawm lub teeb.

lub neej voj voog

Ntaus Coelenterates kuj tsiag ntawv los ntawm qhov tseeb hais tias muaj ntau yam ntawm nws cov tsiaj nyob rau hauv lub neej voj voog muaj ib tug alternation ntawm tiam. Piv txwv li, polyp Aurelia kom multiplies asexually los ntawm budding. Thaum lub sij hawm, lub cev ntawm ib tug ntawm lawv yog muab faib los ntawm transverse constrictions. Raws li ib tug tshwm sim, muaj me me jellyfish. Dig muag, lawv zoo li ib pawg ntawm cov phiaj no mus. Ib tug los ntawm ib tug lawv tuaj tawm rau sab saum toj thiab mus rau ib qho kev ywj thiab active txoj kev ua neej.

Alternating kev sib deev thiab asexual tiam lifecycle coelenterates txhawb ib tug sai nce nyob rau hauv lawv cov xov tooj thiab ntau npaum dispersal.

Muaj xws li ntaus Coelenterates chav kawm ntawv, polyps tsis cleaved. Lawv tsim zos ntawm bizarre nrhiav. Qhov no coral polyps. Yog tsis muaj alternation ntawm tiam thiab dej tsis qab ntsev Hydra. Lawv cov me nyuam los ntawm budding lub caij ntuj sov thiab lub caij nplooj zeeg mus rau kev sib deev tu tub tu kiv, thiab ces tuag. Lub fertilized qe siv lub caij ntuj no nyob rau hauv qab ntawm reservoirs. Thiab nyob rau hauv lub caij nplooj ntoos hlav ntawm lawv tsim hluas Hydra.

Ib tug ntau yam ntawm coelenterates

Hom Coelenterates nyob rau hauv qhov yog sawv cev los ntawm ob lub neej cov ntaub ntawv: polyps thiab jellyfish. Ib qho ntawm feem nthuav cov neeg sawv cev ntawm thawj pab pawg neeg yog actinium. Qhov no cov neeg ntawm lub sov tauj seas, uas, ua tsaug rau ib tug qaim xim, zoo nkaus li zoo li ib tug zoo heev paj. Li no, lub thib ob lub npe ntawm actinium - hiav txwv anemones. Co muaj lim feeders thiab npua. Thiab ib co hom hiav txwv anemones yuav nkag mus rau hauv thiab ob tog pab co-hav zoov nrog rau ib leeg crabs.

Polyp muaj peev xwm yuav tawm mus nyob ib ncig ntawm thiab noj qhov seem ntawm cov organic khoom noj khoom haus arthropods. Ib tug cancer cell yog kev tiv thaiv stinging hiav txwv anemones. Interestingly, hloov los ntawm lub sij hawm rau lub sij hawm dab dej, nws hloov muaj thiab polyp. Cancer cwj nrag anemone claws, tawm hauv nws nyob ib leeg crawls rau hauv ib lub tsev tshiab.

Ib tug colony ntawm coral polyps tsim ib tug lossis loj pawg. Piv txwv li, lub Great Barrier Reef stretches raws ntug dej hiav txwv ntawm teb chaws Australia tshaj ib tug deb ntawm txog 2 txhiab km.

Lub ntsiab lus coelenterates nyob rau hauv qhov thiab tib neeg lub neej

Muaj ntau coelenterates yuav ua tau txaus ntshai rau tsiaj txhu thiab tib neeg. Khiav lag luam lawv stinging hlwb ua kub yus. Lawv lub txim rau tus txiv neej tej zaum yuav tu-sauv, mob taub hau, teeb ntawm lub plawv thiab ua pa kabmob. Yog hais tias lub sij hawm tsis pab, thiab tau tuag.

Polyps thiab jellyfish yog ib qho tseem ceeb link nyob rau hauv lub saw ntawm dej inhabitants. Ib tug coral nyob rau hauv ntau lub teb chaws yog siv rau cov kev ua hniav nyiaj hniav kub, souvenirs thiab lub tsev cov ntaub ntawv.

Yog li ntawd, hom Coelenterates, ib tug general yam ntxwv uas tau los sib tham, yog sawv cev los ntawm ob lub neej cov ntaub ntawv. Nws polyps thiab jellyfish. Cov tsiaj no yog yus muaj los ntawm radial symmetry, lub xub ntiag ntawm tshwj xeeb hlwb thiab lub alternation ntawm tiam nyob rau hauv lub neej voj voog.