Qhov twg coelenterates zom zaub mov: tshwj xeeb tshaj yog physiology

Tej me nyuam dej Hydra, jellyfish thiab corals - yog ntse coelenterates tsiaj uas yog multicellular. Yuav ua li cas hom ntawm txoj kev ua neej ua lawv ua? Cov pub? Qhov twg coelenterates zom cov zaub mov? Cov lus teb rau cov no thiab lwm yam lus nug yuav tsum nyob rau hauv peb tsab xov xwm.

General yam ntxwv ntawm coelenterates

Txawm tias muaj tseeb hais tias lawv yog multicellular, coelenterates tsis muaj ntaub so ntswg. Yog li ntawd, tsis muaj lawv thiab kabmob. Coelenterates txwm yog hauv lub xub ntiag ntawm tshwj xeeb hlwb uas rau ob txheej cev. Lub sab nraum no yog hu ua cov ectoderm. Nws yog tsim los ntawm cov nrab, ntxais ntxais, daim tawv nqaij, nqaij, pw ua ke thiab hlab ntsha hlwb.

Endoderm - lub puab txheej coelenterates lub cev. Qhov no yog ib feem ntawm lub cev qhov twg coelenterates zom zaub mov. Xav txog cov physiological nta ntawm tus txheej txheem no los ntawm cov piv txwv ntawm dej tsis qab ntsev Hydra.

cavitary plab zom mov

Hydra yog tsis muaj peev xwm sawv ntawm active zog. Cov nuj nqi ntawm ib yam ntawm cov sucker lawv ua tib tug, nyob rau sab nraud uas yog lub qhov ncauj. Nws yog surrounded los ntawm tentacles. Qhov twg coelenterates zom cov zaub mov? Qhov no yuav pib nyob rau hauv lub cev muaj kab noj hniav.

Hydra muaj feem xyuam rau me me crustaceans thiab ntses kab siv stinging hlwb. Ntxiv feelers extraction tsiv los ntawm lub qhov ncauj mus rau hauv lub cev muaj kab noj hniav. Glandular hlwb yog ib feem ntawm lub endodermal, cais tshwj xeeb zais cia, los ntawm cov uas tus cov zaub mov so rau hauv ib tug neeg daim.

cellular plab zom mov

Cov nram qab no qauv, qhov twg cov zaub mov yog nqis coelenterates yog digestive hlwb. Lawv muaj flagella, uas tsim ib tug tam sim no ntawm cov dej. Nrog rau qhov no cov khoom noj seem no coj tuaj rau lub cell nto. Yuav muaj lub theem tom ntej ntawm nws cleavage.

Digestive hlwb kuj muaj cuav ko taw. Qhov no fickle outgrowths cytoplasm. Lawv coj cov zaub mov, thiab nws yog nyob rau hauv lub cell. Muaj, nyob rau hauv lub digestive vacuoles tshwm sim zaum kawg cleavage txheej txheem. Undigested residues kuj yog distinguished los ntawm lub qhov ncauj.

Yog li ntawd, peb xam seb qhov twg coelenterates zom zaub mov. Qhov no txoj kev yuav siv sij hawm qhov chaw nyob rau hauv ob ua sawv. Tag nrho coelenterates yog ua npua. Nrog lawv ua kom xiam hoob khab prey stinging hlwb. Tentacles uas puag ncig lub qhov ncauj, txav mus rau hauv lub plab hnyuv lumen. Muaj pib thawj zaug rau theem ntawm kev zom, uas culminates nyob rau hauv tshwj xeeb endoderm hlwb.