Question

Which of the following is a soft material in the tooth?
a) Dentine
b) Pulp
c) Enamel
d) Root

Answer 1

Hint: The teeth are the hard structures that are present for chewing and cutting of food. They consist of two regions known as the crown region and the root region. The one that is visible to the eyes is the crown region and the one which is not visible and is present inside the jaw is known as the root region.

Complete answer:
The teeth are composed of three basic structures present: the outer hard covering called the enamel, the hard inner part called the dentine and the soft tissue present called the pulp. The pulp is the nourishment source of the dentine. It is composed of the cells and blood vessels and nerves that occupy the cavity present in the center of the tooth. The pulp consists of a long pulp chamber. This chamber has a pulp canal which extends till the root of the tooth.

So, the answer is ‘pulp’.

Additional information: The enamel present on the pulp teeth is the hardest part present in the whole body. It is made up of the inorganic matter present and covers the crown of the tooth. Inner to the enamel lies the dentine layer. It is less hard than the enamel. It has a similar composition to that of the bone. It forms the major bulky part of the tooth. It is covered by the enamel in the crown region and cementum on the roots. It derives its nutrition from the pulp which is present inside it in a cavity.

Note:
The teeth are composed of the hard parts and the soft parts. The hard parts are enamel, dentine, and cementum whereas the soft part consists of the pulp. Humans have 20 primary and 32 permanent teeth. The teeth present are of different types and used for different purposes.