Choose the odd one out from each group and give reasons. (i) liver, salivary gland, starch, gall bladder (ii) stomach, liver, pancreas, salivary gland (iii) tongue, absorption, taste, swallow (iv) oesophagus, small intestine, large intestine, rectum

(i) Starch : liver, salivary gland and gall bladder are all parts of the alimentary canal. They either produce an enzyme or store it. It facilitates digestion. Whereas starch is a type of food.

(ii) Stomach: liver, pancreas and salivary glands are the glands which produce enzymes.

(iii) Absorption : Tasting and swallowing are the functions performed by a tongue but it never helps in absorption.

(iv) Small intestine: Oesophagus, large intestine and rectum are not involved in any type of food digestion. Oesophagus provides a passage for food ttransfer, large intestine is mainly involved in water reabsorption from undigested food, while rectum temporarily stores faeces. Only small intestine is involved in digestion of food

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