Nab tsis muaj hniav. Hloov chaw, muaj qhov chaw nruab nrab ntawm cov incisors thiab premolars hu ua diastema (Daim duab 1). Cov premolars thiab molars yog anatomically zoo tib yam, ua kom sib txawv ntawm txhua tus hniav nyuaj.
Vim li cas luav tsis muaj hniav?
Lav yog herbivores, txhais tau hais tias lawv yuav yuav tsum tsis txhob rhuav cov nqaij lossis gnaw pob txha Yog li ntawd, tsis txhob siv cov ntse canines uas pom hauv lub qhov ncauj ntawm miv thiab dev, Lawv muaj kev sib xyaw ntawm incisors, molars, thiab premolars. Lawv cov hniav yog nkhaus, thiab enamel tsuas yog pom nyob rau pem hauv ntej ntawm cov hniav.
Pob luav puas muaj cov hniav?
Nab muaj cov hniav thiab sab plhu. Cov hniav hauv pliaj muaj ob qho tib si premolars thiab molars. Nab tsis muaj cov hniavib yam li miv, dev, ferrets thiab hedgehogs. Luav muaj diphydont dentition txij li thaum lawv muaj deciduous (primary) thiab theem nrab (tus neeg laus) cov hniav.
Puas luav tsuas muaj ob tug hniav xwb?
Lab muaj tsuas yog 28 hniav – 2 lub ntsiab incisors saum thiab hauv qab (cov hniav loj uas koj pom nyob rau hauv pem hauv ntej), 2 peg hniav (me me me incisors ib sab ntawm lub ntsiab saum toj kawg nkaus.), thiab 22 premolars thiab molars (cov grinders tom qab - txhua sab muaj 6 nyob rau sab saum toj thiab 5 nyob rau hauv qab).
Koj thov txim rau tus luav li cas?
Thov zam txim rau koj tus luav, zaum lossis nteg hauv av ntawm theem thaum muab qee yam khoom nyiam rau lawvntawm koj txhais tes, ntawm koj txhais taw, los yog los ntawm ib qho chaw sab xis ntawm koj txhais ceg. Yog tias koj tus luav ntshai tiag tiag lossis chim siab, tsis txhob sim kov lawv lossis cuam tshuam.
