Video: Puas yog nyuj muaj ob txheej hniav?
2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
Nyuj muaj peb caug- ob zuv , suav nrog rau 6 incisors lossis tom cov hniav thiab ob canines nyob rau pem hauv ntej ntawm lub puab tsaig hauv qab. Tus nus cov hniav tsis taw tes tab sis zoo li incisors. Tus incisor cov hniav ntsib nrog tuab tuab kev kho hniav ncoo ntawm lub puab tsaig sab saud.
Cia li xav txog qhov no, cov nyuj puas loj hlob tuaj tshiab?
Nyuj , zoo li ntau yam tsiaj, pib lub neej nrog menyuam mos lossis mis nyuj cov hniav . Los ntawm kwv yees li ob xyoos ntawm cov hnub nyoog no cov hniav raug hloov nrog tas mus li cov hniav . Mus tas li cov hniav tawg nyob rau hauv khub pib nrog khub chaw.
Ib yam nkaus, nyuj muaj hniav dab tsi? Teb thiab Piav Qhia: Tus nyuj muaj 32 tus hniav: rau cov hniav , ob tug menyuam yaus thiab tus so yog cov pos hniav. Feem ntau ntawm cov nyuj cov hniav nyob hauv nws lub puab tsaig qis. Sab saum toj, nyuj tsis muaj hniav nyob hauv
Ib tus kuj tseem yuav nug, ua li cas koj muaj hnub nyoog nyuj los ntawm nws cov hniav?
Ntsuam xyuas nws cov hniav pab tau koj hnub nyoog tus tsiaj. Txiav txim siab qhov hnub nyoog ntawm nyuj mus txog 5 xyoos ntawm hnub nyoog yog qhov yooj yim thiab raug: tus tsiaj muaj ob txoj hauv kev txuas ntxiv ntawm 2 xyoos ntawm hnub nyoog 4, ua 3y hnub nyoog ua, 6y4y hnub nyoog thiab tag nrho lub qhov ncauj ntawm yim qhov txuas txuas ntxiv ntawm 5 xyoos ntawm hnub nyoog.
Tus tsov ntxhuav cov hniav txawv li cas ntawm tus nyuj nyuj?
Lions yog carnivores - lawv tsuas noj nqaij. Lawv loj, ntse cov hniav tau tsim los kom tua tsiaj thiab noj nqaij. Nyuj Ntawm qhov tod tes, yog herbivores - lawv tsuas yog noj cov nroj tsuag.
Pom zoo:
Puas yog mis nyuj tsis muaj mis nyuj vegan?
Cov neeg uas muaj kev tsis haum rau lactose tuaj yeem noj cov zaub mov uas muaj casein thiab whey, uas yog cov protein ntau, tsis yog suab thaj. Yog tias cov khoom lag luam tau sau npe tias tsis muaj lactose, qhov ntawd tsis tau txhais hais tias nws tsis tas yuav muaj mis nyuj dawb. Cov neeg uas nrhiav cov khoom tsis pub mis nyuj tuaj yeem yog vegan lossis muaj kev tsis haum rau mis nyuj (feem ntau yog cov protein, casein lossis whey)
Vim li cas tus nyuj thiaj hu ua nyuj nyuj?
Cov npe. Lub npe cowslip tej zaum yuav muab los ntawm lus Askiv qub rau nyuj quav, tej zaum vim tias cov nroj tsuag tau pom ntau zuj zus nyob hauv cov quav hauv cov nyom nyuj. Ib qho kev xaiv lwm yam tsuas yog hais txog qhov nplua lossis av av; dua, ib txwm nyob rau tsob ntoo no
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
Tus txheej txheem txheej txheej txheej thaum ub zoo li cas?
Kev tsim cov txheej txheem thaum ntxov hauv lub blastocyst suav nrog kev sib koom ua ke ntawm kev sib koom tes thiab rov kho cov hlwb hauv epiblast. Cells overlaying Koller Sickle nyob rau tom qab kawg ntawm tus me nyuam qaib embryo txav mus rau kab nruab nrab, sib ntsib thiab hloov kev taw qhia mus rau nruab nrab ntawm epiblast