1. | The surface of the crown of the tooth is covered with a strong protective layer known as the _______. |
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Hint
Half-n-half Clue
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2. | The mucus in the stomach protects the stomach tissues from the action of enzymes. |
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3. | The part of the tooth outside the socket of the jaw is known as the crown. |
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4. | Which of the following prevents food from entering the trachea (wind pipe)? |
| Half-n-half Clue
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5. | How many teeth does an adult human being normally have? |
| Half-n-half Clue
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6. | Which of the following is the common passage for the food eaten and the air breathed? |
| Half-n-half Clue
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7. | The stomach is lined with mucous membrane. |
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