CBSE Class 10 Answered

(a)

(i)Part in which starch digestion starts - Mouth

(ii)Part in which bile is stored - Gall Bladder

(iii)Part in which nutrients are absorbed - Small intestine

(iv)Part in which water is absorbed - Large intestine

(b)Kills bacteria in the stomach (1/2) provide acidic medium for the action of pepsin.

(c)(i) Controls the release of food from the stomach to small intestine.

(ii) Controls the release of undigested waste from the rectum through the anus.

OR

(a)

(b) Within the lungs, the passage divides into smaller and smaller tubes which finally terminate in balloon - like structures which are called alveoli.

The walls of the alveoli contain an extensive network of blood-vessels which provides surface where the exchange of gases can take place.