Biology for IGCSE & O level - Human Nutrition (Section 5 - No. 40)
Which of the following processes takes place during chewing and swallowing?
The teeth grind the food into smaller pieces.
Saliva mixes with the food.
The epiglottis closes over the trachea.
The oesophagus contracts to push the food downwards.
Explanation
Chewing involves the teeth breaking down food and saliva mixing with it to form a bolus, followed by swallowing with epiglottis closing the trachea to prevent aspiration, the oesophagus is contracted to move food towards the stomach
Comments (0)
