Video: Cov neeg tawv ncauj puas muaj cov hniav sab saud?
2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
Cov ruminants xws li nyuj, yaj thiab tshis yog tshuaj ntsuab nrog lub cev tshwj xeeb zom. Ib tug tseem ceeb feature ntawm hniav hniav anatomy yog tias lawv tsis muaj Upper incisors , es tsis txhob " kho hniav ncoo ", raws li qhia hauv daim duab rau sab xis ntawm tus tshis.
Yog li ntawd, tus nyuj puas muaj hniav?
Nyuj muaj peb caug-ob cov hniav , suav nrog rau incisors los yog tom cov hniav thiab ob tus menyuam dev nyob rau pem hauv ntej ntawm lub puab tsaig hauv qab. Lub incisor cov hniav ntsib nrog tuab tuab kho hniav pad ua sab sauv puab tsaig. Nyuj muaj rau premolars thiab rau cov hniav ntawm ob qho tib si saum thiab lub puab tsaig hauv qab rau tag nrho nees nkaum plaub cov hniav.
Ib sab saum toj no, cov yaj puas muaj cov hniav sab saud? Yaj muaj tsis muaj cov hniav nyob rau hauv pem hauv ntej ntawm lub sab sauv lub puab tsaig uas muaj qhov ntom, tawv, fibrous ncoo. Thaum yug los, menyuam yaj feem ntau tsis muaj cov hniav . Thaum lub sij hawm lub sij hawm cov hniav tab tom loj hlob, yaj raug xa mus los ntawm tus lej ruaj khov incisors tam sim no, xws li ob- hniav , plaub- hniav , six- hniav , yim- hniav los yog lub qhov ncauj tag nrho
Thiab cov lus nug yog, tshis puas muaj cov hniav sab sauv?
tshis muaj 24 cov hniav ntawm lub puab tsaig qis, ib yam nkaus, uas lawv siv los zom lawv cov zaub mov. Ntawm lawv sab sauv lub puab tsaig, txawm li cas los xij, cov tshis ua tsis muaj hniav ; xwb, lawv muaj ib lub ncoo tshwj xeeb, hu ua a kho hniav ncoo, uas pab lawv txhuam thiab rhuav lawv cov zaub mov!
Tus nyuj muaj pes tsawg tus hniav?
A nyuj muaj 32 cov hniav : six ua incisors , ob tug canines thiab tus so yog molars. Feem ntau ntawm a nyuj cov hniav nyob rau hauv nws lub puab tsaig qis. Nyob sab saum toj , ib nyuj muaj tsis muaj cov hniav nyob rau hauv
Pom zoo:
Dab tsi yog txheej txheej sab saum toj ntawm daim tawv nqaij nyob ib sab ntawm daim tawv nqaij?
Lub dermis txuas cov epidermis mus rau hypodermis, thiab muab lub zog thiab kev ywj pheej vim muaj cov collagen thiab elastin fibers. Nws tsuas muaj ob txheej: txheej txheej papillary nrog papillae uas nthuav mus rau hauv daim tawv nqaij thiab qis dua, txheej txheej reticular uas muaj cov ntaub so ntswg sib txuas xoob
Koj puas tuaj yeem tau cov hniav nyiaj hniav kub yog tias koj muaj cov hniav nkhaus?
Koj tuaj yeem tau txais cov hniav nyiaj hniav kub txawm tias koj tsis muaj cov hniav ncaj ncaj. Cov pwm uas peb tau txais los ntawm peb cov neeg siv khoom tso cai rau peb ua cov hniav nyiaj hniav kub kom haum rau lawv cov hniav thiab tsis muaj teeb meem tiag tiag txawm hais tias cov hniav puas nkhaus lossis tawg. Peb tseem tuaj yeem ua cov hniav nyiaj hniav kub ncaj kom koj cov hniav saib ncaj
Puas yog nyuj muaj cov hniav sab saud?
Nyuj muaj peb caug-ob tus hniav, suav nrog rau tus hniav los sis tom hniav thiab ob rab hmuv nyob tom hauv ntej ntawm lub puab tsaig hauv qab. Cov hniav incisor ntsib nrog cov tawv tawv tawv tawv ntawm lub puab tsaig sab sauv. Nyuj muaj rau rau tus menyuam hauv plab thiab rau tus hniav rau ob lub puab tsaig sab saum toj thiab hauv qab rau tag nrho nees nkaum plaub tus hniav
Vim li cas qis qis qis dua muaj stomata ntau dua li daim tawv nqaij sab saud?
Piav qhia: Txhua qhov chaw ntawm nplooj ntoo muaj qee tus nqi ntawm stomata rau kev tswj cov pa pauv rau cov duab ci. Txawm li cas los xij, cov kab mob qis qis (sab hauv qab ntawm nplooj) muaj ntau dua, vim tias nws feem ntau nyob hauv qhov ntxoov ntxoo thiab yog li nws txias dua, uas txhais tau tias kev nqus dej yuav tsis tshwm sim ntau dua
Lub qhov ncauj sab saud lub npe hu li cas?
Lub palate, uas yog lub ru tsev ntawm lub qhov ncauj, tau muab faib ua ob ntu. Sab pem hauv ntej muaj ridges thiab yog tawv (nyuaj palate). Sab nraub qaum yog tus du thiab muag (palate mos)