"(a) Why is nutrition necessary for the human body?(b) what causes movement
Channel: Doubtnut
Date: 2020-04-12

"(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 ?"