--- title: Teeth: baby teeth, grown-up teeth and wobbly teeth — a lesson of Mova's school · trees and pragmatics description: «Teeth: baby teeth, grown-up teeth and wobbly teeth», a lesson of the biology course of Mova's primary school, sentence by sentence with dependency trees and pragmatics. It begins: You get two sets of teeth in your life: a small set of baby teeth for a small jaw, and a big set of grown-up teeth that --- [Mova](https://md.mova.elamur.ai/free/en/) · [this page in HTML](https://mova.elamur.ai/free/en/corpora/school/biology/351-teeth-baby-teeth-grown-up-teeth-and-wobbly-teeth/) [home](https://md.mova.elamur.ai/free/en/) / [corpora](https://md.mova.elamur.ai/free/en/corpora/) / [school](https://md.mova.elamur.ai/free/en/corpora/school/) / [Biology](https://md.mova.elamur.ai/free/en/corpora/school/biology/) / Teeth: baby teeth, grown-up teeth and… # Teeth: baby teeth, grown-up teeth and wobbly teeth Lesson 351 of the biology course of Mova's primary school: 14 sentences, each with its syntax tree and pragmatics. The lessons are written for Mova, and their agreed trees are part of Mova corpus 0.4 (CC BY-SA 4.0). How Mova does on its tests: [the lesson at school](https://md.mova.elamur.ai/free/en/school-run/biology/351-teeth-baby-teeth-grown-up-teeth-and-wobbly-teeth/). - [0](https://md.mova.elamur.ai/free/en/corpora/school/biology/351-teeth-baby-teeth-grown-up-teeth-and-wobbly-teeth/0/) — You get two sets of teeth in your life: a small set of baby teeth for a small jaw, and a big set of grown-up teeth that has to last until you are old. - [1](https://md.mova.elamur.ai/free/en/corpora/school/biology/351-teeth-baby-teeth-grown-up-teeth-and-wobbly-teeth/1/) — Picture a dentist's X-ray of a seven-year-old: the baby teeth sit in the mouth, and underneath them, packed into the jaw like eggs in a box, the grown-up teeth are already waiting. - [2](https://md.mova.elamur.ai/free/en/corpora/school/biology/351-teeth-baby-teeth-grown-up-teeth-and-wobbly-teeth/2/) — When a grown-up tooth starts to push up, it dissolves the root of the baby tooth above it, so the baby tooth wobbles and falls out with hardly any root left, and that is why it barely hurts. - [3](https://md.mova.elamur.ai/free/en/corpora/school/biology/351-teeth-baby-teeth-grown-up-teeth-and-wobbly-teeth/3/) — Teeth look like bones, but they are not: the hard outside has no living cells, so a tooth cannot mend itself the way a broken arm does. - [4](https://md.mova.elamur.ai/free/en/corpora/school/biology/351-teeth-baby-teeth-grown-up-teeth-and-wobbly-teeth/4/) — A full set of baby teeth, also called milk teeth, has 20 teeth: ten on top and ten on the bottom. - [6](https://md.mova.elamur.ai/free/en/corpora/school/biology/351-teeth-baby-teeth-grown-up-teeth-and-wobbly-teeth/6/) — The first baby tooth usually comes through at about six months, often at the bottom front, and teething can make a baby grumpy and dribbly; about one baby in a few thousand is born with a tooth already showing. - [7](https://md.mova.elamur.ai/free/en/corpora/school/biology/351-teeth-baby-teeth-grown-up-teeth-and-wobbly-teeth/7/) — A wobbly baby tooth is loose because the grown-up tooth underneath has dissolved its root, and a new tooth usually comes through the gap within a few months. - [8](https://md.mova.elamur.ai/free/en/corpora/school/biology/351-teeth-baby-teeth-grown-up-teeth-and-wobbly-teeth/8/) — A child's jaw holds two sets at once: baby teeth in the mouth and grown-up teeth forming underneath, years before they come through. - [9](https://md.mova.elamur.ai/free/en/corpora/school/biology/351-teeth-baby-teeth-grown-up-teeth-and-wobbly-teeth/9/) — At about six, the first grown-up back teeth, the six-year molars, come in behind the baby teeth without any baby tooth falling out, so many people do not realise they are permanent. - [10](https://md.mova.elamur.ai/free/en/corpora/school/biology/351-teeth-baby-teeth-grown-up-teeth-and-wobbly-teeth/10/) — A grown-up set has 8 incisors for cutting, 4 canines for gripping, 8 premolars and 12 molars for grinding. - [11](https://md.mova.elamur.ai/free/en/corpora/school/biology/351-teeth-baby-teeth-grown-up-teeth-and-wobbly-teeth/11/) — Lions have huge canines for gripping prey, while cows have no top front teeth at all, only a hard pad to press grass against. - [12](https://md.mova.elamur.ai/free/en/corpora/school/biology/351-teeth-baby-teeth-grown-up-teeth-and-wobbly-teeth/12/) — In Britain and the USA the tooth fairy swaps a lost tooth for a coin; in Spain a mouse called Ratoncito Pérez does the job, and in some countries children throw the tooth onto the roof. - [13](https://md.mova.elamur.ai/free/en/corpora/school/biology/351-teeth-baby-teeth-grown-up-teeth-and-wobbly-teeth/13/) — People get only two sets of teeth, while sharks and crocodiles keep growing new ones all their lives, and elephants get six sets of big molars one after another. - [14](https://md.mova.elamur.ai/free/en/corpora/school/biology/351-teeth-baby-teeth-grown-up-teeth-and-wobbly-teeth/14/) — Teeth are not bones: they have no marrow, the enamel has no living cells, and a hole in a tooth cannot heal by itself. - ← previous: [Farm animals by numbers: stomachs, hooves, toes, eggs and litres](https://md.mova.elamur.ai/free/en/corpora/school/biology/350-farm-animals-by-numbers-stomachs-hooves-toes-eggs-and-litres/) - next →: [Teeth: enamel, sugar, holes, brushing and the dentist](https://md.mova.elamur.ai/free/en/corpora/school/biology/352-teeth-enamel-sugar-holes-brushing-and-the-dentist/) - ↑ back to [Biology](https://md.mova.elamur.ai/free/en/corpora/school/biology/)