(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 .

Explanation

(a) The length of the small intestine differs in various animals depending on thetype of food they eat. For example, cellulose is a carbohydrate food which is digested with difficulty. So, the herbivorous animals like cow which eat grass need a longer 'small intesting' to allow the cellulose present in grass to be digested completely. On the other hand, meat is a food which is easier to digest. So, the carnivorous animals like tigers which eat meat, have a shorter 'small intestine'.
(b) The inner surface of small intestine has millions of tiny, finger-like projections called villi. The presence of villi gives the inner walls of the small intestine a very large surface area and the large surface area of smalll intestine helps in the rapid absorption of digested food.