description of teeth

8. Human being have thirty two teeth ,one
tongue and three pairs of salivary gland
in mouth. Each teeth is fixed in the
cavities of the lower jow.The first teeth
formed after the birth of a child are called
Milk Teeth. Among the 32 permanent
teeth four are called Wisdom Teeth
appear only in adulthood.

13.  Enamel: The hardest ,white outer part of the tooth.
 Dentain : A layer underlying the enamel, it is made up of
living cells.
 Pulp : The softer ,living inner structure of teeth.
 Cementum :A layer of connective tissue that binds the roots
of the teeth firmly to the gums and jawbone.
 Periodontal ligament: Tissue that helps to hold the teeth
tightly against the jaws