Cnidoblasts yog cov yam ntxwv ntawm phylum Cnidaria. Cov no muaj nyob rau ntawm lub cev nto thiab tentacles. Lawv muaj nematocysts, uas yog stinging capsules. Nws pab txhawm rau ntes cov tsiaj nyeg thiab tiv thaiv.
Dab tsi yog qhov tseem ceeb ntawm cnidoblast hauv Coelenterate?
Teb: Cnidoblasts yog cov qauv ntawm tes tshwj xeeb uas muaj nyob hauv coelenterates uas muaj cov kab mob stinging hu ua nematocysts. Nws yog coiled threadlike qauv, uas pab ntes, thauj cov tsiaj nyegNws muaj tshuaj lom uas ua rau tus neeg tuag tes tuag taw thiab nws pab tuav tau yooj yim.
Cnidoblast yog dab tsi thiab lawv ua haujlwm li cas?
Kawm txog cov ncauj lus no hauv cov kab lus no:
… ib lub xov tooj tshwj xeeb hu ua cnidoblast thiab muaj cov coiled, hollow, feem ntau cov xov barbed, uas tig tawm sai sai (i.e., yog everted) los ntawm cov tshuaj ntsiav raws li qhov tsim nyog stimulation. Lub hom phiaj ntawm txoj xov, uas feem ntau muaj tshuaj lom, yog txhawm rau tiv thaiv cov yeeb ncuab lossis ntes cov tsiaj
Nematocyst sau nws qhov tseem ceeb yog dab tsi?
Nematocysts yog
organelles uas muaj cov kab mob stinging . Lawv muaj nyob rau hauv Cnidarians. Nematocyst ua rau cov neeg tuag tes tuag taw los ntawm kev txhaj tshuaj lom thiab pab Cnidarians kom ntes lawv cov tsiaj.
Dab tsi yog kev ua haujlwm ntawm stinging hlwb?
Stinging cells pab jellyfish catch prey vim lawv muaj organelles hu ua nematocysts. Thaum ib yam dab tsi txhuam tawm tsam jellyfish, cov nematocysts tua tawm, chob txhua yam uas lawv ntsib, thiab tso cov venom, ua rau peb muaj qhov sting.
