Page 271 - New Medley 4 Semester 1

2 • Understanding

Fill in the blanks.
1. Tooth decay leads to .

2. Saliva helps in the digestion of .
3. The food is completely digested in the .

4. The water from the undigested food is absorbed in the .

AT ONE GO

m There are two sets of teeth in humans — Milk teeth and permanent teeth.

m Incisor, canine, premolar and molar are four types of teeth.
m We should take good care of our teeth.

m Food is digested in the digestive system with the help of digestive juices.

REMEMBER THESE TERMS

Gum line : The outline of gums

Floss : Special kind of silk thread used to clean in between the teeth
Enamel : The outermost white layer of a tooth

Dentine : The layer found below the enamel
Saliva : Digestive juice in the mouth

Check Your Study

A. Tick () the correct answers.
1. The number of teeth in the mouth of a one-month old child is

(a) 0 (b) 2 (c) 4 (d) 10

2. The set of teeth in a four-year old child is called
(a) baby teeth (b) milk teeth

(c) permanent teeth (d) wisdom teeth

3. The number of teeth in an adult is

(a) 22 (b) 30 (c) 32 (d) 42
4. The sharp teeth in the front part of a jaw are called

(a) canines (b) incisors (c) molars (d) premolars

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