Biology
Study the diagram given below and then answer the questions that follow:
(a) Name the parts labeled 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 labeled '3'.
(d) Give the total number of the type of tooth mentioned in '1' above, in the mouth of an adult and state its function.
Digestive System
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Answer
(a) The parts are-
- 1 → Enamel
- 2 → Dentine
- 3 → Pulp
- 4 → Gum
- 5 → Crown
- 6 → Cement
(b) The type of teeth shown in the given figure has only one root. Hence it is a canine or incisor that is used to bite or pierce.
(c) The part labelled '3'(Pulp) is a soft connective tissue present in the pulp cavity of the tooth. It consists of blood capillaries, lymph vessels and nerve fibres. From the crown of the tooth, the pulp opens through the pulp cavity at the base of the root.
(d) The type of teeth mentioned in the figure and its function are as follows:
| Type of teeth | Number of teeth | Function |
|---|---|---|
| Incisors | 8 | Used to cut and bite |
| Canines | 4 | Used to tear and hold food |
| Premolars | 8 | Used to grind and crush food |
| Molars | 12 | Used to grind and crush food |
Answered By
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