Brush up your english free pdf

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A tooth is one of the hard, white things in your mouth. Birds are the biggest group that don’t. Different animals have different kinds of teeth because they eat different foods. Some animals use teeth as a weapon. Human adults usually have 32 teeth.

Some human babies are born with teeth. Natal teeth are teeth that are present at birth. These are different from neonatal teeth which are teeth that emerge during the first month of life. Deciduous teeth or milk teeth or temporary teeth are the first set of teeth for most mammals.

7 the permanent teeth start to erupt. 12 most children have 28 adult teeth. Some people never grow wisdom teeth. Or they may have only two instead of four. The outside white part of teeth is called the enamel. The enamel is made of calcium phosphate and is very hard. Under the enamel is the dentine.