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What does the respiratory system do?
What does the digestive system do?
What does the circulatory system do?
What does the excretory system do?
What does the skeletal system do?
What is digestion?
What are the two types of digestion?
What is mechanical digestion?
What is chemical digestion?
What are the four types of teeth we have?
What do the canines do?
What do incisors do?
What do the molars and the premolars do?
What is saliva?
What does saliva do?
What is bolus?
What is an oesophagus?
What does the oesophagus do?
What is peristalsis?
What is epiglottis?
