Taw qhia: Puas yog Rat Teeth Sharp?
Cov nas tau paub tias yog ib qho ntawm cov kab tsuag ntau tshaj plaws nyob rau hauv nroog thiab nyob deb nroog. Lawv yog cov yug me nyuam sai, tuaj yeem hloov mus rau qhov chaw sib txawv, thiab tuaj yeem ua rau muaj kev puas tsuaj loj rau cov khoom thiab ua rau muaj kev phom sij rau tib neeg. Ib qho tseem ceeb tshaj plaws ntawm cov nas yog lawv cov hniav. Lawv muaj cov hniav ntev, ntse, thiab niaj hnub loj hlob tuaj uas ua rau lawv gnaw los ntawm yuav luag txhua yam. Tab sis tsuas yog nas cov hniav ntse npaum li cas?
Anatomy ntawm Rat Teeth
Cov hniav nas yog ib feem ntawm lawv lub puab tsaig thiab yog tsim los ntawm enamel, dentine, thiab pulp, ib yam li tib neeg cov hniav. Txawm li cas los xij, cov qauv thiab qhov loj ntawm cov hniav nas txawv ntawm tib neeg cov hniav. Cov hniav nas muaj ntau dua, sib npaug ntev dua, thiab taw qhia ntau dua li tib neeg cov hniav. Lawv muaj qhov tshwj xeeb hu ua hypsodonty, uas txhais tau hais tias lawv tseem loj hlob thoob plaws hauv lawv lub neej. Qhov no yog vim li cas nas yuav tsum tsis tu ncua gnaw ntawm cov khoom kom tsis txhob ua puas lawv cov hniav thiab kom lawv nyob rau hauv ib tug ntev lub sij hawm.
Hom Rat Teeth
Cov hniav tuaj yeem muab faib ua peb hom: incisors, canines, thiab molars. Txhua hom hniav ua lub luag haujlwm tseem ceeb hauv cov nas noj zaub mov thiab tus cwj pwm.
Incisors: Cov Hniav Pem Hauv Ntej
Rat incisors yog cov hniav uas paub zoo tshaj plaws vim lawv qhov ntev thiab ntse. Lawv feem ntau yog siv rau gnawing thiab tom, ua kom yooj yim rau lawv burrow rau hauv vaj tse thiab lwm yam qauv. Cov hniav no loj hlob li ntawm 4 lossis 5 ntiv hauv ib xyoos, uas yog vim li cas nas yuav tsum tau khaws cov khoom kom tsis txhob loj hlob ntev.
Canines: Fangs ntawm nas
Rat canines nyob tom qab lub incisors thiab kuj luv dua li cov incisors. Lawv yog siv los tuav thiab rhuav cov zaub mov sib nrug. Cov hniav no tseem ntse thiab tuaj yeem ua rau mob tom.
Premolars thiab Molars: Sib tsoo cov hniav
Rat premolars thiab molars nyob tom qab ntawm lawv lub qhov ncauj thiab siv rau kev sib tsoo zaub mov. Cov hniav no tsis yog ntse li incisors thiab canines tab sis yog qhov tseem ceeb rau kev sib cais cov khoom noj nyuaj.
Cov hniav sib piv rau lwm cov nas
Cov hniav nas zoo ib yam li lwm cov nas xws li nas, squirrels, thiab beavers, tab sis muaj qee qhov sib txawv. Piv txwv li, beavers muaj ntev incisors tshaj nas, thaum squirrels muaj luv incisors tab sis loj dua molars. Cov kev sib txawv ntawm cov hniav no yog vim lawv cov khoom noj thiab ib puag ncig.
Cov nas thiab lawv cov zaub mov
Cov nas yog omnivores, txhais tau tias lawv noj cov nroj tsuag thiab tsiaj txhu. Hauv cov qus, lawv noj txhua yam ntawm cov noob thiab txiv hmab txiv ntoo mus rau kab, noog me, thiab tsiaj txhu. Hauv nroog, lawv noj cov khib nyiab, tsiaj txhu, thiab txawm tias tib neeg cov zaub mov. Lawv cov hniav ntse ua rau lawv gnaw los ntawm cov ntaub ntawv tawv xws li ntoo, yas, thiab hlau nkag mus rau zaub mov thiab vaj tse.
Yuav Ua Li Cas Nyuaj Cov Hniav?
Cov hniav nas yog cov ntse heev thiab tuaj yeem tho los ntawm daim tawv nqaij thiab lwm yam ntaub ntawv yooj yim. Lawv cov incisors muaj peev xwm ua kom muaj zog txog li 24,000 phaus ib square inch, uas muaj zog txaus rau gnaw los ntawm cov pob zeb thiab cov kav hlau. Lawv cov hniav ntse kuj tso cai rau lawv ua rau muaj kev puas tsuaj loj rau cov qauv thiab cov khoom siv hluav taws xob, ua rau muaj kev phom sij rau hluav taws.
Rat Bite: Dangers thiab Risks
Cov nas tom tuaj yeem ua rau muaj kev phom sij thiab muaj kev pheej hmoo kis mob. Cov nas muaj ntau yam kab mob, xws li leptospirosis, salmonella, thiab hantavirus, uas tuaj yeem kis tau rau tib neeg los ntawm lawv cov qaub ncaug, zis, lossis quav. Tsis tas li ntawd, nas tom tuaj yeem ua rau tetanus, nas-tom kub taub hau, thiab lwm yam kab mob uas tuaj yeem ua rau muaj kev phom sij rau lub neej yam tsis muaj kev kho mob.
Cov lus qhia txog kev tiv thaiv kab mob nas
Txhawm rau tiv thaiv kev kis kab mob nas, nws yog ib qho tseem ceeb uas yuav tsum tau kaw cov qhov qhib hauv koj lub tsev lossis lub tsev, khaws cov khoom noj kom ruaj ntseg thiab nkag tsis tau rau cov nas, thiab tshem tawm cov dej los yog cov dej noo. Nws tseem yog ib qho tseem ceeb uas yuav tsum ua kom koj cov khoom huv si thiab tsis muaj clutter, uas tuaj yeem muab qhov chaw nkaum rau nas.
Xaus: Cov hniav nas yog ntse thiab txaus ntshai
Cov hniav nas yog ntse thiab ua ib feem tseem ceeb hauv lawv txoj kev ciaj sia thiab tus cwj pwm. Lawv cov incisors, canines, thiab molars yog tag nrho cov yoog raws lawv cov zaub mov thiab ib puag ncig, cia lawv gnaw los ntawm yuav luag txhua yam yooj yim. Txawm li cas los xij, cov hniav ntse no kuj ua rau muaj kev pheej hmoo rau tib neeg, vim cov nas tom tuaj yeem ua rau muaj teeb meem loj. Tiv thaiv nas kab mob thiab ua raws li kev ceev faj tsim nyog tuaj yeem pab ua kom koj lub tsev thiab cov khoom muaj kev nyab xeeb los ntawm cov kab mob txaus ntshai no.
