Sidee dhaladii tollayn da'da?

dhakada Human ma aha oo kaliya formation lafaha ugu muhiimsan, laakiin sidoo kale ugu muuqaal caan ah. Sidaa darteed, dhammaan kala duwanaansho ay aan la qarin karo. Marxaladaha Isbadal arrin qaraabo iyo qof kasta waa u gaar ah, laakiin waxaa jira tilmaamo guud oo ku saleysan da'da.

Inta lagu guda jiro nolosha dhaladii aadanaha la kulmin noocyo kala duwan oo isbedel. Waxaa ugu horayn ka walaacsan la saftay. Conventionally, waxaa jira shan xilli weyn isbedelka. Ha ka fikiro si aynu kasta oo ka mid ah in faahfaahin dheeraad ah.

muddada ugu horeysay

Xiligan waa xiliga ugu firfircoon ee koritaanka madaxa muddo toddobada sano ee hore ee nolosha. Laga soo bilaabo dhalashada ilaa lix bilood, ku dhawaad laba-jibbaar ku neurocranium mugga. By laba sano, ay mugga saddex laab, oo ay da'doodu shan waa saddex-meelood dhakada oo dhan. ratio Tani waxay la hayo nolosha. Waxa ay ahayd inta lagu jiro xilliga this waa fossa cranial qoto dheer, oo xagga dambe ee madaxa uu bilaabo inuu hadlo. Intaa waxaa dheer, nudaha membranous ee wareegga cranial iyo unugyada cartilaginous in lafta occipital way isbaddali oo si tartiib ah u baaba'aan. Waxay dhacdaa (tallaabo hore) ee hore ee la xirrira lafaha ee kama tollayn madaxa. muddo Tani waa mid aad u muhiim ah, sababtoo ah kama tollayn dhaladii ma fududa si loo sugo lafihii madaxa kasta oo kale oo, ka sii muhiimsan, waa goobta ay koritaanka in width.

Qoondaynta oo ah tolay cranial

Tolay waxaa loo kala saaraa sida ay foomka soo socda:

• waayihiisa;
• qolof,
• flat.

Baxbaxsan tollayn dhakada sameeyay laba meelaha lafaha markii mid ka mid ah ayaa saadaashii, oo dhinaca kale ah - uruursanayey buuxinta Saadaasha kuwan. Tani nooca goysyada waa ugu raagaya. By ku dahaadhnaa laba af leh lafaha ku xiga kala daataa sameeyay tollin dhakada. All dun waxaa ka buuxa unugyo in siiyaa xoog iyo dhaqdhaqaaqa xeryahooda sida. Iyo nooca saddexaad ee welds - guri. tollin dhakada Flat sameeyay xiriir meelaha lafaha yar galgaloolan ama gebi ahaan guri. Iyada oo noocan ah ee la xidhiidha tollayn dhacaa lafaha wajiga u dhaxeeya, oo aan magacooda ku xiran tahay dhismaha lafaha isku xiran.

The isbedel muddo labaad

In ka badan shanta sano ee soo socda, lafihii madaxa waxaa ka badan ayaa si tartiib ah u koraya. Waxay dhacdaa ka badan aragga isbedel lagu dareemi karaa in koritaanka iyo qaabka qaybta hore ee dhaladii (kastana falagiisuu dhex ah, dalool sanka iyo maxillary). Xidhan xitaa in muddo dhalaanka fontanelles si buuxda u baaba'aan, iyo kala-goysyada waxaa ka buuxa connective Tacna.

muddo saddexaad

Xilligan waxa ay ku beegan tahay qof qaangaadhnimada iyo soconaysaa muddo toban sanadood ah (kala duwan 14-15 sano jir ilaa 25 jir). Waxaa yimaado koritaanka dhakada final oo dhan of lafaha axial. In muddo this nolosha (ka duwan labadii hore) waa koritaanka dheeraad ah oo degdeg ah dhaladii wajiga, halkii cerebral. tollin dhakada sida formation jidh sii waarta, iyo waxay ka bilaabanaysaa muddo lafoobid, taas oo uu socdaa ilaa da 'weyn. Kordhinta salka dhaladii jiho kasta, ma ahan oo keliya ballaaran. Ugu dambayntii sameeyay grooves, Oo tiixtiix, kuuskuus iyo JQSHM pneumatic.

Muddada afaraad

Laga soo bilaabo 25 sano iyo ilaa iyo 45 jiro wax badalina uma lafihii horumarinta madaxa. Muddadan, kama tollayn dhaladii ossified. Mararka aad dhif u ah, kala-goysyada sii nolosha oo dhan.

Muddada shanaad

Heerkan waxa socdaa muddo kama tollayn imperforate in ay da 'weyn. Waxay dhacdaa in degree weyn isbedelka jidh, iyo dhismaha. Arag bedelay dhakada wajiga qofka ilkuhu u sabab iyo atrophy of habka alveolar. Iyadoo da'da, oo dhumucdiisuna waa la dhimay cancellous iyo saxan is haysta iyo qalfoofka uu noqdo mid fudud. Sababtoo ah resorption laftayda iyo macdanta lafaha badala dhismeedkooda sii debcaan, crack iyo nasasho.

gunaanad

dhakada Human - waxa loogu yeero madaxa lafaha. Qaab dhismeedka Tani jidh waa mid aad u muhiim ah ma aha oo kaliya ilaalinta maskaxda iyo xubnaha dareenka. Waxa uu qaabeeyaa our muuqaalka (Ciqaabtii).

tollayn dhakada ah, sida unit-dhismeedka-functional ah ka ciyaartaa door muhiim ah ka wada isku xirta lafaha qalfoofka. In carruurta, tolay leedahay dabacsanaan weyn, laakiin da'da ay ossify.

Marxaladaha horumarka lafaha qalfoofka leeyihiin xadka da'da. Sidaas darteed, muddo ka dhalatey, xataa marka fontanels ku kaydsan (stage membranous), soo baxa koriinkedu carjawda aadanaha ee talaabo, ka dibna ilaa lafta.

By waqtiga dhalashada aan la dhamaystiro iyo formation of dhaladii. Waxaa jira shan marxaladaha kala duwan ee ay horumarka. Sidaas daraaddeed, laga bilaabo dhalashada ilaa da'da dugsiga (6-7 sano) dhaladii koraa inta badan ee height, shan ilaa toddoba sano ee soo socota waa muddo deganaan ah, iyo bilawga ah ee qaangaadhnimada iyo ilaa 25 sano jir dhici beddelka inta badan ay qeyb ka hor.