Name the following:
The three parts of a tooth.
Parts of tooth:
Final Answer: The three parts of a tooth are root, neck and crown.
When a person eats sugary food, then organisms A present in his mouth act on sugar to produce a substance B. The substance B first dissolves the calcium salts from the top part C of the tooth and then (rum its middle part D forming holes E. These holes ultimately reach the part F in the lower part of tooth which contains: nerves and blood vessels. The substance B irritates the nerve endings inside the tooth causing toothache.
(a) What are (i) organisms A, and (ii) substance B? (b) What are (i) part C, and (ii) part D, of tooth known as? (c) By what name are the holes E in the tooth known? (d) Name the part F of the tooth. (e) What will happen if organisms A reach part F of the tooth?
Study the diagram given below and then answer the questions that follow :
(a) Name the parts labelled 1, 2, 3, 4, 5 and 6.
(b) Identify the tooth and give a reason to support your answer.
(c) Describe the structure of the part labelled '3'.
(d) Give the total number of the type of tooth mentioned in 'l' above, in the mouth of an adult and state its function.
Structure of a tooth shows three parts - enamel, ___ and pulp cavity.
Name the following Deficiency of a mineral responsible for tooth decay