1. The surface of the crown of the tooth is covered with a strong protective layer known as the _______.   dentine   cavity   enamel   root   Hint Half-n-half Clue   2. Which is not a part of the small intestine?   duodenum   jejunum   caecum   ileum   Half-n-half Clue   3. Which of the following prevents food from entering the trachea (wind pipe)?   glottis   epiglottis   larynx   pharynx   Half-n-half Clue   4. The part of the tooth outside the socket of the jaw is known as the crown.   True   False   5. Which is not a part of the large intestine?   rectum   caecum   ileum   colon   Half-n-half Clue   6. The stomach is lined with mucous membrane.   True   False   7. Which is the largest organ in the human body?   pancreas   liver   small intestine   large intestine   Half-n-half Clue