The mouth and digestive organs
Answers are for parents and teachers.
1
List the digestive organs in order and give one function for each.
Mouth – crushing; oesophagus – passage; stomach – protein digestion; small intestine – digestion and absorption; large intestine – water absorption.
2
Write the dental formula: numbers of incisors, canines, premolars and molars.
8 incisors, 4 canines, 8 premolars, 12 molars.
3
What benefit does hydrochloric acid in gastric juice bring?
It kills microbes and activates pepsin.
4
What are villi and why are they needed?
Projections on the inner intestinal surface; they increase the absorbing surface.
5
Write 4 rules of oral hygiene.
Brush twice a day; moderate sweets; do not crack hard things with teeth; dentist check-ups.