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Give the differences between, 1. Temporary teeth are called, milk teeth., , 1. The teeth which grow in, place of milk teeth are, permanent teeth., , 1. They are 20 in number., , 2. They are 32 in number.
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Give the differences between, Incisors, , Canines, , • They are chisel-shaped and, are flat with sharp edges., • They are used for biting, and cutting food., • They are 4 in each jaw., , • They are sharp and pointed, teeth., • They are used for tearing, food., • They are 2 in each jaw.
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Give the differences between, Enamel, , Dentine, , • The outer white layer of, tooth is enamel., • It is the hardest part of the, body., , • The middle layer of tooth is, dentine., • It is softer than the enamel.
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1. The top part of the tooth is, crown., , 1. The lower part of the tooth, is root., , 2. Crown is seen above the, gums, , 2. Root of the tooth cannot, be seen as it is inside the, gums.
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Q.1. Name the different kinds of teeth we have., Ans. The different kinds of teeth are1. Incisors, 2. Canines, 3. Premolars, 4. Molars, , Q2. What is the function of molars?, Ans- They are used for crushing and grinding food before we, swallow it.
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., , Q3. Name three layers of a tooth., Ans. The three layers of tooth are1. Enamel, 2. Dentine, 3. Pulp, Q4. How does a tooth cavity form?, Ans- A tooth cavity forms when germs feed on, the bits of food stuck in the teeth and produce, acids. The acids eat through the enamel and, make a hole called a cavity.
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., , Q5. Write any three habits that help you to take, care of your teeth., Ans., ➢Brush our teeth twice a day., ➢Rinse our mouth after every meal., ➢Gently massage the gums.
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., , Q6. What are microbes? Write the names of, different microbes and their diseases., , Ans. Microbes are extremely small living things., 1) Bacteria- Typhoid, Tuberculosis, 2) Viruses- Common cold, Influenza, 3) Protozoa- Malaria, Dysentery, 4) Fungi- Ringworm, Athlete’s foot
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Q7. Draw tooth diagram and label it.