Human Digestive Systems

Question 1

What Digestion

Answer 1

The process by which larger food molecules are broken down into smaller food molecules

Question 2

Digestion at the mouth 1. Physical/mechanical Digestion
Chewing >grinding food with teeth to increase surface area for easy Digestion by enzyme

Mixes food with saliva , lubricating food to avoid choking when swallowing

Question 3

Chemical Digestion

Answer 3

Starch contained in food in the mouth is digested by enzyme amylase to maltose

Question 4

Digestion in the oesophagus

Answer 4

Digestion of starch continues
Peristalsis» relaxation and contraction of muscles of the oesophagus pushing food bolus down the stomach

Question 5

Digestion in the stomach

Answer 5

The stomach walls secrete a juice known as a gastric juice containing enzyme pepsin and HCL

Question 6

Hydrochloric acid in digestion

Answer 6

Provides an acidic condition for enzyme pepsin to work at its optimum best
It kills germs ingested with food