Question

Science

Chapter 2

Class 4

Question :

1) Name the types of teeth.

2)Which animals have only bottom teeth?

3) The two sets of Teeth are?

4) parts of a tooth are?

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Answer 1

Answer:

Names and functions of teeth

We have different types of deciduous teeth: incisors, canines,first molars, and second molars. Each tooth has four types of surfaces. They are the inner surface, outer surface,chewing surface and adjacent surface.

Cattle do have molars on the upper and lower jaw, but their incisors are only the lower jaw. As a cow gets older, their teeth shows more wear.

Humans, like other mammals, are diphyodont, meaning that they develop two sets of teeth. The first set (called the "baby", "milk", "primary", or "deciduous" set) normally starts to appear at about six months of age, although some babies are born with one or more visible teeth, known as natal teeth.

Each tooth has four main parts, including the following:

Enamel. The outer layer of the tooth and the hardest material in the body.

Dentin. The inner layer and the main part of the tooth, and the largest dental tissue.

Pulp

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Root

Answer 2

Answer:

1.teeth are four types cannie,insisor,moalar,premolar

2.cow

3.two setsof teeth are lower jaw and upper jaw or buccal cavity