Heterodont- Cov tsiaj txhu feem ntau yog heterodont, uas txhais tau hais tias lawv muaj ntau hom hniav. Cov tsiaj txhu feem ntau muaj incisors, canines, premolars, thiab molars.
Puas yog tib neeg cov hniav heterodont?
Cov hniav yog heterodont, lawv daim ntawv sib txawv hauv kev koom tes nrog ntau yam haujlwm xws li txiav, xuas nrig ntaus thiab sib tsoo. Cov hniav sib txawv muaj npe, raws li hauv qab no, los ntawm pem hauv ntej mus rau sab nraum lub qhov ncauj: incisors (I), canines (C), premolars (P) thiab molars (M).
Lub ntsiab lus ntawm heterodont yog dab tsi?
: muaj cov hniav sib txawv rau hauv incisors, canines, thiab molars heterodont mammals - piv homodont.
Vim li cas tib neeg cov hniav?
Txhua zaus peb luag nyav, ntsej muag, tham, lossis noj, peb siv peb lub qhov ncauj thiab hniav. Peb lub qhov ncauj thiab cov hniav cia peb ua lub ntsej muag sib txawv, tsim cov lus, noj, haus, thiab pib txheej txheem ntawm kev zom. Lub qhov ncauj yog qhov tseem ceeb rau kev hais lus. Nrog daim di ncauj thiab tus nplaig, cov hniav pab tsim cov lus los ntawm kev tswj cov pa tawm ntawm qhov ncauj.
Homodont vs heterodont dentition yog dab tsi?
Homodont - Cov hniav yog tib yam nkaus (feem ntau vertebrates, ob peb tsiaj). Heterodont - Cov hniav muaj cov qauv sib txawv thiab ua haujlwm nyob rau ntau qhov chaw ntawm kab hniav (cov tsiaj nyeg, ob peb ntses).