Puas stingrays muaj cov hniav dermal?
Puas stingrays muaj cov hniav dermal?

Video: Puas stingrays muaj cov hniav dermal?

Video: Puas stingrays muaj cov hniav dermal?
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Cov stingrays yog ib pawg ntses tshwj xeeb uas feem ntau hu ua "flattened sharks" vim lawv yog cov txheeb ze ze rau sharks. … Lub caudal "barb" los yog "qaum" yog qhov tseeb hloov ntsuas hu ua "dermal denticles" ntawm sharks thiab rays.

Txiv kab ntxwv muaj daim tawv nqaij li cas?

Cov tawv nqaij ntawm cov duab tshav thiab cov skates zoo ib yam li cov sharks. Cov tawv nqaij zoo nkaus li zoo li cov ntawv xuab zeb vim nws yog tsim los ntawm cov hniav me me zoo li cov qauv hu ua placoid scales, tseem hu ua dermal denticles. Cov nplai no taw rau tus Tsov tus tw thiab pab txo qis kev sib txhuam los ntawm cov dej nyob ib puag ncig thaum tus tsiaj ua luam dej.

Dab tsi muaj tsiaj txhu muaj dab tsi?

"Denticle" tuaj yeem xa mus rau: Denticle (tus hniav feature), serrations ntawm cov hniav ntawm dinosaurs, lizards, sharks, thiab mammals. Dermal denticles lossis placoid nplai, hauv cov ntses cartilaginous.

Puas yog ib tug stingray tua nws barb?

Stingrays tsuas yog siv tau lawv cov barb tiv thaiv, uas txhais tau tias tsis muaj ib yam dab tsi li "stingray attack." Raws li American Tsev khaws puav pheej ntawm Natural History, "Thaum tshwm sim los ntawm kev ntxhov siab nyob rau sab nraum qab ntawm stingray, tus Tsov tus tw yog dheev thiab muaj zog thrusted upwards thiab rau pem hauv ntej, rau hauv tus neeg raug tsim txom, uas ua rau lub …

Dab tsi yog stingray barbs ua los ntawm?

Stingray barbs yog ua los ntawm a dentine thiab enamel-zoo li cov ntaub ntawv, zoo ib yam li cov hniav zoo li nplai ntawm sharks. Cov pob txha no muaj nyob rau sab saum toj ntawm tus Tsov tus tw. Tus stingray's venom yog ib qho tshuaj lom neeg muaj protein ntau uas ua rau muaj mob loj hauv cov tsiaj thiab kuj tuaj yeem hloov lub plawv dhia thiab ua pa.

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