1. How many teeth does an adult human being normally have?   16   20   30   32   Hint Half-n-half Clue   2. The part of the tooth inside the socket of the jaw is known as the _______.   enamel   dentine   root   crown   Half-n-half Clue   3. The stomach is lined with mucous membrane.   True   False   4. Which is not a part of the small intestine?   ileum   caecum   duodenum   jejunum   Half-n-half Clue   5. A tooth is made up of a solid bony tissue known as _______.   dentine   root   enamel   crown   Half-n-half Clue   6. The surface of the crown of the tooth is covered with a strong protective layer known as the _______.   enamel   dentine   cavity   root   Half-n-half Clue   7. Which of the following prevents food from entering the trachea (wind pipe)?   pharynx   glottis   epiglottis   larynx   Half-n-half Clue