(a) Why is small intestine in herbivores longer than in carnivores ?
(b) What causes movement of food inside the alimentary canal?

The small intestine in herbivores is longer than that in carnivores. Why ?

(a) Why is nutrition necessary for the human body? (b) what causes movement of food inside the alimentary canal? (c) why is small intestine in herbivores longer than in carnivores ? (d) what will happen if mucus is not secreted by the gastric glands ?

Name the tissue responsible for the Following functions in our body : (a) Storage of fat , (b) Movement of limbs, (c) Movement of food in the alimentary canal (d) Act as barrier to keep different body systems separate.

(a) Compare the length of small intestine in herbivore and carnivore animal. (b) Mention any two structural modifications in small intestine which helps in absorption .

(a) Name the photoreceptors of eye. Also name the pigments they contain. (b) What causes movements of the eye in the orbit ?

Assertion : Gastric glands occur throughout the alimentary canal. Reason : Gastric juice inhibits movement of food through the alimentary canal

Assertion : Mucous glands occur throughout the alimentary canal Reason : Mucous substances facilitate movement of food through the alimenatary canal

Answer brief : (i) Why are villi present in the intestine and not in stomach? (ii) How does pepsinogen change into its active form? (iii) What are the basic layers of the wall of alimentary canal? (iv) How does bile help in digestion of fat?

Describe the following processes in the body. (a) Coagulation of milk in alimentary canal. (b) Digestion of fats in the intestine. (c ) Digestion of starch in the alimentary canal. (d) Role of bile salts in the digestion and absorption of fats. (e ) Microbial digestion of cellulose in the herbivore alimentary canal.