THE DIGESTIVE SYSTEM : THE MOUTH AND THE OESOPHAGUS

Question 1

Name the two types of digestion that occur in the mouth

Answer 1

mechanical and chemical

Question 2

explain mechanical digestion in the mouth

Answer 2

the teeth and tough help to grind food into smaller particles by chewing or churning the food

the tongue aides in mixing the food with saliva

Question 3

explain chemical digestion in the mouth

Answer 3

the salivary gland under the tongue produce an secrete the enzyme “salivary amylase “which helps breakdown STARCH into a soluble molecule called GLUCOSE

Question 4

what happens after the chewing food

Answer 4

after chewing , the food particles are shaped into a spherical stricture called the bolus which is then swallowed

Question 5

what is the oesophagus

Answer 5

it is a tube that connects the mouth to the stomach

Question 6

what is peristalsis

Answer 6

peristalsis is the process in which the bolus is moved down the the oesophagus by circular muscle activity

Question 7

explain how the muscles work to move the bolus down the tube

Answer 7

the muscle layers contract and relax and relax rhythmically to push the food down