Answer:

(i) It helps in digesting food

(ii) Hydrochloric acid in stomach helps in breaking down of food

(iii) Villi helps in the absorption of nutrients in the small intestine through lacteals

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Answer:

(i) Digestive enzymes help with the breakdown of food so that the nutrients contained within the food can be absorbed. It works by breaking down large macromolecules such as protein, fat and carbohydrates into their smaller building blocks so that they can be absorbed by the body.

(ii)The hydrochloric acid in the gastric juice breaks down the food and the digestive enzymes split up the proteins. The acidic gastric juice also kills bacteria.

(iii)The villi of the small intestine project into the intestinal cavity, greatly increasing the surface area for food absorption and adding digestive secretions.