TEETH

Question 1

Teeth is made up of ?

Answer 1

DENTINE (Mesodermal in origin)

Question 2

Which cells secrete dentine ?

Answer 2

ODONTOBLAST

Question 3

In how many parts is the teeth divided ?

Answer 3

1. Crown - exposed part
2. Neck - part embedded in the gums
3. Root - part embedded in the socket of the jaw

Question 4

Why the growth of the teeth stop ?

Answer 4

The growth of the teeth stop because the pulp cavity closes after sometimes.
except - tusk of elephant(upper incisors) and walrus(upper canine)

Question 5

What present in the center of the teeth ?

Answer 5

PULP CAVITY is present in the center of the teeth and they are lined by odontoblast cells.

Question 6

What forms the hard chewing surface of the teeth ?

Answer 6

Enamel forms the hard outer covering

Question 7

What is enamel ?

Answer 7

1. Enamel is the hardest part
2. Ectodermal in origin
3. Secreted by ameloblast cells

Question 8

What is cementum ?

Answer 8

1. Also called Sharpey’s fiber
2. Helps in the attachment of teeth
3. With the advancement of the age cementum decay and the teeth fall off.

Question 9

What provides hardening to teeth ?

Answer 9

Calcium phosphate provides the hardening to the teeth.

Question 10

What are types of dentition present in the human beings?

Answer 10

1. Thecodont
2. Heterodont
3. Diphyodont
4. Bunodont