Write a short note on mechanical digestion and chemical digestion. Name the location where both the types take place. [3 MARKS]
Digestion: 1 Mark each
Location: 0.5 Mark each
Mechanical digestion: It involves mastication (chewing, mashing, and breaking) of food into smaller pieces. It happens in the mouth, where teeth cuts and grinds the food. Saliva helps in bolus formation.
Chemical digestion: It involves changing food into smaller particles through the action of enzymes. It involves the breakdown of the larger molecules by hydrolysis. Chemical digestion happens throughout the digestive system starting from the action of saliva in mouth.