Hakori tsarin: ilimin Halittar Jiki tausasãwa nasaba aiki

A primary aiki na hakora (as wani mutum ko dabba) ga kowa ba a asirce. Yana - nika abinci (a cikin dabbobi kuma kama da rike ganima). Anatomy of hakora da kuma su siffar ne dan kadan daban-daban dangane da aikin. Akwai hudu iri: incisors, canines, premolars da molars. A cikin mutane, na farko biyu jinsin da wani sabon aiki, da kuma na karshe - murkushe.

Ta yaya suka yi aiki

Yawan hakora a cikin mutane - 32, shi ne daban-daban a cikin dabbobi (dangane da nau'in). Suna located a jere daga cikin manya kuma ƙananan jaws. hakori tsarin wa wani daga cikin muƙamuƙi ƙasũsuwa a general guda, suna hada da irin wannan nama. Kowane daga cikinsu an located in da kansa kashi rami kafa ƙananan ko babba muƙamuƙi, kira Alveoli. Anatomically a wani hakori ne da wadannan sassan: kambi, wuyansa, tushen (daya ko fiye). Crown - da na sama na mafi m for dubawa, doguwar sama da danko. A cervix ne karamin bakin ciki Division, dake a cikin taushi nama kauri. Haka kuma, tushen - bangaren da faruwa a cikin zurfin da kyau. Its karshen tip na hakori yana kira, ta hanyar jikin ta fall a cikin jijiyoyi da jini. Hakori tsarin (ko canine ko matauni) ne m ba kawai waje form, amma kuma da yawan Tushen (1 zuwa 3). Siffar abun yanka - lebur kuma m, sunã da wani sabon abu. Canines halin wasa bit, premolars da molars - taban da ake markedly m surface.

Don bayyana da ciki tsarin da hakori, ya kamata a lura da cewa nama yadudduka shirya a cikinta. A mafi zurfi Layer - ~ angaren litattafan almara - An wakilta neuro-jijiyoyin bugun gini cuta. Dentin na kewaye da shi, wani lokacin ake magana a kai a matsayin hakori kashi. Yana kyawawan m, amma shi iya yi laushi lokacin da fallasa su kwayoyin. Amma bayanin tsarin da hakori a cikin farfajiya Layer, shi wajibi ne a ce shi ne ba iri daya ba a cikin kambi da kuma tushen. Da farko enamelled (strikingly m, wanda hada da 97% ma'adinai salts). A m Layer na tushen da aka hada da sumunti, a cikin abin da, baicin da lemun tsami salts ne babban adadin collagen zaruruwa. Recent saka a cikin kashi, da samar da periodontal (da haka attaching da hakori to ta rami).

Comparative halaye

Kamar yadda aka ambata a sama, wani mutum hakori yana da biyu main ayyuka: daga incisors da canines - yankan, a premolars da molars - nika. A dabbobi masu shayarwa, da karshen biyu yi a irin wannan manufar. Amma ga incisors da canines ne daban-daban. A farko da yara ana amfani da su "yanka" da abinci guda, fangs - kashe da kuma rike da azabtar. Front sabon hakora na herbivores halittu masu rai bukatar yanke shuke-shuke, su sãduwa zuwa gare abinci. Canines ne sau da yawa ba a nan. Idan har yanzu suna can, kana ya gabatar kawai a cikin maza. su suna yawanci amfani domin yaki da juna domin mace da gubar a cikin mataki (a fakitin). Microscopic tsarin da hakora, kamar yadda aka bayyana a sama, a duk jinsunan dabbobi masu shayarwa rayayyun kwayoyin halitta wajen kama.

Yanzu da ka san game, da abin da ya kunshi hakora! Wannan inforrmatsiya a wasu lokuta kuma zai iya zama da amfani!