Kura mazino itsva? Vanotsvakurudza vanoti zvinokwanisika

Kana usingade kuenda wemazino, hausiwe woga. Vanhu vakawanda nezvemhosva kushanyira unyanzvi izvi. Imwe ongororo muNetherlands, kunyange kuwana kuti 24% vanhu vakuru havana chete kusada uye kutya vanachiremba vemazino. Mukuwedzera, chinokosha nhamba yevanhu vari kuedza kudzivisa kushanyira izvi makiriniki uye kuenda chete kana zvakakodzera chaizvo. Izvi zvinobatsira kutsanangura nei 92% vanhu vakuru vane in nemazino zvechigarire.

Asi pane akanaka. zvidzidzo Recent dzinoratidza kuti tive mukana zadza in nemazino utano mupenyu rinenge kuti ndichapa zvechigarire mazino edu mukana wechipiri mune ramangwana.

Sei kukura mazino ari Sharks

Zvingaita kuti, zvichienzaniswa nevamwe mhando, vanhu havasi rombo chaizvo, nokuti tine kugadzirisa rimwe iine mazino yose akura upenyu. Fans pamusoro Sharks Somuenzaniso, vanoziva chokwadi kuti mhuka idzi dzine muganhu anogadza mazino hwose. Vamwe vavo vane nhamba mazino pasi ganda, vakangomirira ari mapapiro yokutsiva rawa. Uyezve, zino yokutsiva inoitika ose mavhiki matatu. Ndokusaka nyanzvi dzinodavira kuti mugungwa yakazara meno Sharks.

The kunzwisisa mamiriro

Asi kana rehove, kufanana vakawanda zvinokambaira uye amphibians unogona kutsiva mazino avo hwose, zvino nei vanhu uye mhuka dzakawanda vakagamuchira nemhando mbiri chete kwemeno?

Chokwadi chokuti pane kuwirirana pakati kunzwisisa uye uwandu seti kwemeno, riri mhando. Sezvo mhuka anokwanisa kutsenga, vaiva rinovira dzakaoma kwemeno maumbirwo siyana. Somuenzaniso, akataura canines vane chete kuvaka-kumusoro, ukuwo premolars - maviri molars - mana kana mashanu. kunzwisisa maumbirwo mazino kwakadaro kunobva chii achidya mhuka. Species vanodya yemishenjere Somuenzaniso, vane kwazvo maumbirwo kwemeno. Saka, hofori Panda kana yemishenjere lemur vane yakaoma shure meno aine zvizhinji unopinza tubercles, dzinobatsira kutsenga muchikuya zvakaoma tishu. Saka, mazino avo tarira zvakafanana, kunyange kana vasina chokuita nedzimwe mhuka.

Kufanana nedzimwe mhuka kudzosa mazino

Pane mimwe mienzaniso inonakidza dzemhuka vachikwanisa kudzosa mazino avo. Panguva piranhas meno fused pamwechete, uye vanotarira kufanana banga rakapinza chaizvo a. Naizvozvo piranhas vanorasikirwa zino kupfuura rimwe, uye yose quadrant, uye vanofanira kuvimba nevamwe quadrants matatu kurarama kusvikira itsva kuwedzera.

Kunyange zvazvo mhuka kazhinji dzinoratidzwa nemhando mbiri kwemeno - mukaka uye zvechigarire, vamwe izvo zvichachengetwawo kukwanisa kutanga mamwe mazino. Manatees Somuenzaniso, vanokwanisa kutanga mazino kumashure womuromo wake hwose.

Dzimwe mhuka vakagamuchira umwe chete yakatarwa mazino, asi kuramba vari kukura. Tiri kutaura nemakonzo, zvakadai mbeva kana makonzo. Chakavanzika ndechokuti vari chokumisa masero ari zino mudzi, iyo inobatsira kuti ikure dentin uye enamel. Izvi zvakakodzera nokuti zvokudya zvikukutu vanodya.

Evolution muna Action

Kunenge kuti vanhu nokusingaperi mano kuti anogadza anopfuura maviri kwemeno, nekuti mhindumupindu kunoda kuti kusiyana izvi sei kana mwana richapona. Kunyange zvakadaro, isu vachiri kukura iyi - vanamazvikokota vanoti vanhu vashoma vane uchenjeri mazino. molars ichi rechitatu akazviratidzazve mangwanani vayaruka, kana shaya yedu zvakazara kuumbwa. All nekuti hatina kare kugadzirira kwavo zvokudya, uye munyoro, saka kuti kudiwa wechitatu molars panobviswa. Uyezve, shaya yedu painoungana maduku, uye saka, nokuti molars hakuna nzvimbo. Ndokusaka tiri kuona vanhu vakawanda vasina molars rechitatu. Chete anenge 20% vemo vasina mazino uchenjeri.

The kuedza rokutanga masayendisiti

Zvichida isu hakuchazovipo yakatarwa mazino rechitatu, asi kuti haarambidzi masayendisiti kuedza kuwana nzira yokutsiva zvikaramba meno mutsva, uye mupenyu. Murabhoritari pana waMambo College London vakabudirira akasima bio-mazino mune mbeva. Masayendisiti vakashandisa dzevanhu gingival zvinyama uye kunokonzerwa masero kubva mbeva, zvichiguma aigona kukura meno mutsva dentin uye enamel. Mumwe matambudziko yokurapa kushandiswa kwevanhu kuti kurima hunde masero kunoitika ezvokunambira kunze kwomuviri waamai, asi ikoko vanokurumidza vanorasikirwa simba ravo.

Kunyange zvakadaro, zviri sayenzi panyaya iyi kwete panzvimbo, munewo nzira itsva kukura mazino, nokuti icho pulp rinenge inoshandiswa Somuenzaniso, saka kuti zvinokwanisika kuti mushure mechinguva mazino itsva vachava kuwanikwa, uye vanhuwo zvavo.