Question

List the role of each of the following in our digestive system. a) Muscles of Stomach Wall b) Saliva c) Mucus

Answer 1

saliva--saliva acts to start to break down carbohydrates thanks to an enzyme called amylase.
mucus--To protect the stomach from being digested by it’s own acid.

Answer 2

a) Help in mixing the food thoroughly with more digestive juice by peristalsis.

b) Creates an acidic medium which facilitates the action of the enzyme pepsin.

c) Protects the inner lining of the stomach from the action of the acid.